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Explanation A nonagon is a polygon with nine sides. Therefore, the correct answer is 9.
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2.
What is the sum of the exterior angles of a 34-gon?
A.
180
B.
360
C.
90
D.
5760
Correct Answer B. 360
Explanation The sum of the exterior angles of any polygon, regardless of the number of sides, is always 360 degrees. This is a geometric property that holds true for all polygons. Therefore, the sum of the exterior angles of a 34-gon is also 360 degrees.
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3.
What is the sum of the interior angles of a hexagon?
A.
360
B.
180
C.
720
D.
1080
Correct Answer C. 720
Explanation A hexagon has six sides. The sum of the interior angles of any polygon can be found using the formula (n-2) * 180, where n is the number of sides. In this case, (6-2) * 180 = 4 * 180 = 720. Therefore, the sum of the interior angles of a hexagon is 720.
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4.
What is the measure of each exterior angle of a regular heptagon?
A.
51.43Â°
B.
360Â°
C.
154.23Â°
D.
1080Â°
Correct Answer A. 51.43Â°
Explanation The measure of each exterior angle of a regular heptagon can be found by dividing 360Â° (the sum of all exterior angles in any polygon) by the number of sides, which in this case is 7. Therefore, each exterior angle of a regular heptagon measures 51.43Â°.
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5.
How many sides does a regular polygon have if each exterior angle is 22.5°?
A.
15
B.
12
C.
17
D.
16
Correct Answer D. 16
Explanation A regular polygon has equal angles and equal sides. In this case, each exterior angle is given as 22.5Â°. To find the number of sides, we can use the formula for the exterior angle of a regular polygon: 360Â° divided by the number of sides. By setting up the equation 360Â°/x = 22.5Â°, we can solve for x. Dividing 360Â° by 22.5Â° gives us 16, so the regular polygon has 16 sides.
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6.
What is x in the parallelogram below?
A.
22
B.
64
C.
11
D.
3
Correct Answer A. 22
7.
The diagonals in all parallelograms bisect each other.
A.
True
B.
False
Correct Answer A. True
Explanation In a parallelogram, the diagonals are line segments that connect opposite vertices. Since a parallelogram has two pairs of opposite sides that are parallel, the diagonals will intersect at their midpoints. This means that the diagonals bisect each other, dividing each other into two equal parts. Therefore, the statement is true.
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8.
In a rhombus, the diagonals bisect the angles.
A.
True
B.
False
Correct Answer A. True
Explanation In a rhombus, the diagonals bisect the angles because a rhombus is a special type of parallelogram where all sides are equal in length. The diagonals of a rhombus intersect at right angles, dividing the rhombus into four congruent right triangles. Since the opposite sides of a rhombus are parallel, the diagonals bisect the angles formed by the sides, creating two congruent angles at each vertex. Therefore, the statement is true.
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9.
The diagonals in all parallelograms are congruent.
A.
True
B.
False
Correct Answer B. False
Explanation The diagonals in all parallelograms are not congruent. In a parallelogram, the diagonals bisect each other, meaning they divide each other into two congruent segments. However, the diagonals themselves are not necessarily congruent.
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10.
The legs in a trapezoid are always congurent.
A.
True
B.
False
Correct Answer B. False
Explanation The statement is false because the legs in a trapezoid are not always congruent. A trapezoid is a quadrilateral with one pair of parallel sides, and the legs refer to the non-parallel sides. In most cases, the legs of a trapezoid have different lengths, making them non-congruent. However, there are special cases where the legs can be congruent, such as when the trapezoid is an isosceles trapezoid with congruent base angles.
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11.
What is the equation for the sum of the interior angles of a polygon?
A.
(n-2) * 360
B.
N * 180
C.
(n-2) * 180
D.
360
Correct Answer C. (n-2) * 180
Explanation The equation for the sum of the interior angles of a polygon is (n-2) * 180. This equation is derived from the fact that the sum of the interior angles of any polygon can be found by subtracting 2 from the number of sides (n) and then multiplying the result by 180. This formula holds true for all polygons, regardless of the number of sides.
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12.
Consecutive angels in a parallelogram are ___.
A.
Congruent
B.
Complimentary
C.
Supplementary
D.
None of the above
Correct Answer C. Supplementary
Explanation Consecutive angles in a parallelogram are supplementary. This means that the sum of the measures of two consecutive angles in a parallelogram is always 180 degrees. This property holds true for all parallelograms, regardless of their size or shape. Therefore, the correct answer is "supplementary".
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13.
What is the measure of angle 2 in the isosceles trapezoid below?
A.
123Â°
B.
57Â°
C.
33Â°
D.
180Â°
Correct Answer A. 123Â°
Explanation In an isosceles trapezoid, the base angles (angles opposite the parallel sides) are congruent. Since angle 2 is opposite the longer base, it must be congruent to the other base angle, which measures 123Â°. Therefore, the measure of angle 2 in the isosceles trapezoid is 123Â°.
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14.
A quadrilateral with exactly two distinct pairs of adjacent congruent sides is a
Correct Answer kite
Explanation A quadrilateral with exactly two distinct pairs of adjacent congruent sides is a kite. A kite is a special type of quadrilateral that has two pairs of adjacent sides that are congruent. The diagonals of a kite are also perpendicular to each other. This definition fits the given description, as a kite has exactly two pairs of adjacent congruent sides. Therefore, the correct answer is kite.
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15.
A____________________ is a quadrilateral with exactly one pair of parallel sides.
Correct Answer trapezoid
Explanation A trapezoid is a quadrilateral with exactly one pair of parallel sides. In a trapezoid, the parallel sides are called the bases, and the non-parallel sides are called the legs. The parallel sides can be of any length or orientation, as long as they are parallel to each other. The other two sides of the trapezoid may or may not be equal in length. The angles formed by the legs and the bases can vary, but the sum of the interior angles of a trapezoid is always 360 degrees.
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16.
Base angles of an isosceles trapezoid are:
Correct Answer congruent
Explanation In an isosceles trapezoid, the base angles are congruent. This means that the angles formed by the non-parallel sides and the bases are equal in measure. Since the trapezoid has two parallel sides and two non-parallel sides, the base angles on each side are equal. This property is a characteristic of an isosceles trapezoid and helps to identify and distinguish it from other types of trapezoids.
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17.
If both pairs of opposite sides of a quadrilateral are congruent, the the quadrilateral is a ____________________________
Correct Answer parallelogram
Explanation If both pairs of opposite sides of a quadrilateral are congruent, it means that the lengths of the opposite sides are equal. This is a property of parallelograms, where opposite sides are parallel and congruent. Therefore, if a quadrilateral has congruent opposite sides, it must be a parallelogram.
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18.
All angles are right angles.
A.
Parallelogram, Rectangle, Rhombus, Square
B.
Rhombus, Square
C.
Rectangle, Parallelogram
D.
Rhombus, Rectangle
E.
Rectangle, Square
Correct Answer E. Rectangle, Square
Explanation The correct answer is Rectangle, Square. Both a rectangle and a square have all angles that measure 90 degrees, making them right angles. A rectangle is a quadrilateral with opposite sides that are parallel and equal in length, while a square is a special type of rectangle with all sides equal in length. Therefore, both shapes satisfy the condition of having all angles as right angles.
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19.
Opposite sides are congruent.
A.
Parallelogram, Rectangle, Rhombus, Square
B.
Rhombus, Square
C.
Rectangle, Parallelogram
D.
Rhombus, Rectangle
E.
Rectangle, Square
Correct Answer A. Parallelogram, Rectangle, Rhombus, Square
Explanation The statement "Opposite sides are congruent" is true for all parallelograms, rectangles, rhombuses, and squares. In a parallelogram, opposite sides are parallel and congruent. In a rectangle, opposite sides are parallel and congruent, as well as perpendicular. In a rhombus, opposite sides are parallel and congruent, as well as perpendicular. In a square, all sides are congruent, so opposite sides are also congruent. Therefore, the correct answer is Parallelogram, Rectangle, Rhombus, Square.
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20.
Diagonals are perpendicular.
A.
Parallelogram, Rectangle, Rhombus, Square
B.
Rhombus, Square
C.
Rectangle, Parallelogram
D.
Rhombus, Rectangle
E.
Rectangle, Square
Correct Answer B. Rhombus, Square
Explanation The statement "Diagonals are perpendicular" is a property of both rhombus and square. Both shapes have diagonals that intersect at right angles. Therefore, the correct answer is rhombus and square.
Correct Answer A. All: Parallelogram, Rectangle, Rhombus, Square A. All: Parallelogram, Rectangle, Rhombus, Square
Explanation In a parallelogram, rectangle, rhombus, and square, the diagonals bisect each other. This means that the point where the diagonals intersect divides each diagonal into two equal segments. Therefore, the correct answer is "All: Parallelogram, Rectangle, Rhombus, Square".
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22.
All sides are congruent.
A.
Parallelogram, Rectangle, Rhombus, Square
B.
Parallelogram, Square
C.
Rhombus, Square
D.
Rectangle, Rhombus
E.
Rectangle, Parallelogram
Correct Answer C. Rhombus, Square
Explanation The correct answer is Rhombus, Square. A rhombus is a quadrilateral with all sides congruent, so it satisfies the given condition. A square is also a quadrilateral with all sides congruent, so it also satisfies the condition. Both a rhombus and a square have all sides congruent, making them the only two options that fit the given statement.
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23.
A trapeziod with congruent legs is called an
Correct Answer isosceles trapezoid
Explanation An isosceles trapezoid is a trapezoid with two congruent legs. The term "isosceles" refers to the fact that the two legs of the trapezoid are equal in length. This distinguishes it from a regular trapezoid, where the legs are not necessarily congruent. Therefore, the given answer, "isosceles trapezoid," accurately describes a trapezoid with congruent legs.
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24.
How many sides totals do a heptagon and a decagon have together?
A.
17
B.
16
C.
15
D.
18
Correct Answer A. 17
Explanation A heptagon has 7 sides and a decagon has 10 sides. To find the total number of sides, we add the number of sides of both polygons together. Therefore, 7 + 10 = 17.
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25.
Properties of a rectangle:
A.
A parallelogram
B.
All sides congruent
C.
4 right angles
D.
Diagonals are perpendicular
Correct Answer(s) A. A parallelogram C. 4 right angles
Explanation The given answer, "A parallelogram, 4 right angles," accurately describes the properties of a rectangle. A rectangle is a parallelogram because opposite sides are parallel. It also has four right angles, making it a quadrilateral with all interior angles measuring 90 degrees. These properties distinguish a rectangle from other quadrilaterals, such as squares or rhombuses, which may have some but not all of these characteristics. Additionally, the answer does not mention the congruency of the sides or the perpendicularity of the diagonals, which are not defining properties of a rectangle.
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26.
Properties of a rhombus:
A.
A square
B.
A parallelogram
C.
4 congruent sides
D.
Diagonals are perpendicular
E.
Diagonals bisect a pair of opposite angles
F.
4 right angles
Correct Answer(s) B. A parallelogram C. 4 congruent sides D. Diagonals are perpendicular E. Diagonals bisect a pair of opposite angles
Explanation The given answer is correct because it includes all the properties of a rhombus. A rhombus is a parallelogram with 4 congruent sides. The diagonals of a rhombus are perpendicular to each other and bisect a pair of opposite angles. Additionally, a rhombus has 4 right angles. Therefore, the answer accurately describes the properties of a rhombus.
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27.
Properties of a kite:
A.
4 congruent sides
B.
2 pairs of congruent adjacent sides
C.
Diagonals perpendicular
D.
2 pairs of congruent angles
E.
1 pair of opposite angles congruent
F.
Long diagonal bisects short diagonal
G.
Short diagonal bisects long diagonal
Correct Answer(s) B. 2 pairs of congruent adjacent sides C. Diagonals perpendicular E. 1 pair of opposite angles congruent F. Long diagonal bisects short diagonal
Explanation A kite has 2 pairs of congruent adjacent sides, which means that two pairs of sides next to each other are equal in length. The diagonals of a kite are perpendicular, meaning they intersect at a right angle. A kite also has 1 pair of opposite angles congruent, which means that two angles that are opposite each other are equal in measure. Lastly, the long diagonal of a kite bisects the short diagonal, meaning it divides it into two equal parts.
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28.
Properties of a trapezoid:
A.
A parallelogram
B.
1 pair of opposite sides //
C.
// sides called legs, non // sides called bases
D.
// sides called bases, non // sides called legs
E.
Midsegment of a trapezoid connects the midpoints of the legs
F.
Midsegment is // to bases and equal to 1/2 the sum of the lengths of the bases
Correct Answer(s) B. 1 pair of opposite sides // D. // sides called bases, non // sides called legs E. Midsegment of a trapezoid connects the midpoints of the legs F. Midsegment is // to bases and equal to 1/2 the sum of the lengths of the bases
Explanation A trapezoid is a quadrilateral with one pair of opposite sides that are parallel. The sides that are parallel are called the bases, while the sides that are not parallel are called the legs. The midsegment of a trapezoid connects the midpoints of the legs, and it is also parallel to the bases. Additionally, the length of the midsegment is equal to half the sum of the lengths of the bases.
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29.
Properties of an isosceles trapezoid:
A.
Trapezoid w/ congruent legs
B.
A parallelogram
C.
Base angles congruent
D.
Diagonals congruent
Correct Answer(s) A. Trapezoid w/ congruent legs C. Base angles congruent D. Diagonals congruent
Explanation The given properties describe an isosceles trapezoid. An isosceles trapezoid is a trapezoid with congruent legs, meaning that the two non-parallel sides are equal in length. It is also a parallelogram, which means that opposite sides are parallel and congruent. The base angles of an isosceles trapezoid are congruent, meaning that the angles formed by the legs and the bases are equal. Finally, the diagonals of an isosceles trapezoid are congruent, meaning that the line segments connecting opposite vertices are equal in length.