Basic Geometry Quiz For 9th Grade!

Reviewed by Janaisa Harris
Janaisa Harris, BA-Mathematics |
Mathematics Expert
Review Board Member
Ms. Janaisa Harris, an experienced educator, has devoted 4 years to teaching high school math and 6 years to tutoring. She holds a degree in Mathematics (Secondary Education, and Teaching) from the University of North Carolina at Greensboro and is currently employed at Wilson County School (NC) as a mathematics teacher. She is now broadening her educational impact by engaging in curriculum mapping for her county. This endeavor enriches her understanding of educational strategies and their implementation. With a strong commitment to quality education, she actively participates in the review process of educational quizzes, ensuring accuracy and relevance to the curriculum.
, BA-Mathematics
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Welcome to the Basic Geometry Quiz for 9th Grade! This quiz is designed to test your understanding and knowledge of fundamental geometry concepts. Geometry plays a crucial role in understanding the properties and relationships of shapes, lines, angles, and spatial reasoning.
This quiz will assess your ability to apply geometric principles to solve real-world problems and reason logically about spatial relationships.
By participating in this Basic Geometry Quiz for 9th Grade, you will have the opportunity to assess your geometry knowledge and identify areas for improvement. It will serve as a valuable tool for self-assessment and preparation as you continue Read moreyour journey in mastering geometric concepts.

• 1.

How many sides does the triangle have?

• A.

3

• B.

2

• C.

4

• D.

9

• E.

1

A. 3
Explanation
A triangle is a polygon with three sides. Therefore, the correct answer is 3.

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• 2.

An octagon is a member of the polygons. How many sides does it have?

• A.

2

• B.

4

• C.

6

• D.

9

• E.

8

E. 8
Explanation
An octagon is a polygon with eight sides.

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• 3.

A rectangle has a length of 6 inches and a width of 4 inches. What is the area in inches squared?

• A.

24

• B.

27

• C.

26

• D.

22

A. 24
Explanation
The area of a rectangle is L × W, where L is the length and W is the width. Thus, 6 x 4 = 24.

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• 4.

The area of a rectangle is 45 cm2. If its length is 9 cm, then its width in cm is ___________.

• A.

5

• B.

10

• C.

15

• D.

None of the above

A. 5
Explanation
Area = L × W 45 = 9 × W
W = 45 ÷ 9 = 5

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• 5.

The perimeter of a square is 24 cm. The area of the square is cm2

• A.

36

• B.

32

• C.

30

• D.

35

A. 36
Explanation
Perimeter is 4 Ã— a where a is the side of the square
4 Ã— a =24
a = 24 Ã· 4 = 6
Area = a Ã— a = 6 Ã— 6 = 36 cm2

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• 6.

How many squares with the side of 2 cm cover the surface of a rectangle with a length of 24 cm and a width of 8 cm?

• A.

48

• B.

49

• C.

47

• D.

46

A. 48
Explanation
The area of the square is 2 Ã— 2 = 4 cm2
The area of the rectangle is L Ã— W = 24 Ã— 8 = 192 cm2
The number of squares is 192 Ã· 4 = 48

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• 7.

A triangle with one angle greater than 90 degrees

• A.

Equilateral triangle

• B.

Obtuse triangle

• C.

Acute triangle

• D.

Isosceles triangle

B. Obtuse triangle
Explanation
An obtuse triangle is a triangle that has one angle greater than 90 degrees. It is different from an acute triangle, which has all angles less than 90 degrees, and an equilateral triangle, which has all angles equal to 60 degrees. An isosceles triangle is a triangle that has two sides of equal length, but it does not necessarily have an angle greater than 90 degrees. Therefore, the correct answer is obtuse triangle.

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• 8.

A triangle with all three angles less than 90 degrees

• A.

Equilateral triangle

• B.

obtuse triangle

• C.

Acute triangle

• D.

Isosceles triangle

C. Acute triangle
Explanation
An acute triangle is a triangle in which all three angles are less than 90 degrees. This means that none of the angles in the triangle are obtuse (greater than 90 degrees) or right angles (exactly 90 degrees). An equilateral triangle has all three angles equal to 60 degrees, which is less than 90 degrees, making it an acute triangle. An obtuse triangle has one angle greater than 90 degrees, so it is not an acute triangle. An isosceles triangle has two equal angles, but it can still have one angle greater than 90 degrees, making it not an acute triangle.

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• 9.

A triangle having at least two equal sides.

• A.

acute triangle

• B.

Isosceles triangle

• C.

Equilateral triangle

• D.

Obtuse triangle

B. Isosceles triangle
Explanation
An isosceles triangle is a triangle that has at least two equal sides. It is not necessary for all three sides to be equal, as in the case of an equilateral triangle. An acute triangle is a triangle where all three angles are less than 90 degrees, while an obtuse triangle has one angle greater than 90 degrees. Therefore, the correct answer is isosceles triangle.

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• 10.

A triangle with one angle equal to 90 degrees.

• A.

Right triangle

• B.

Equilateral triangle

• C.

Acute triangle

• D.

obtuse triangle

A. Right triangle
Explanation
A triangle with one angle equal to 90 degrees is called a right triangle. In a right triangle, one of the angles is a right angle, which measures 90 degrees. This type of triangle has a unique property where the sum of the squares of the lengths of the two shorter sides is equal to the square of the length of the longest side, which is known as the Pythagorean theorem.

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Janaisa Harris |BA-Mathematics |
Mathematics Expert
Ms. Janaisa Harris, an experienced educator, has devoted 4 years to teaching high school math and 6 years to tutoring. She holds a degree in Mathematics (Secondary Education, and Teaching) from the University of North Carolina at Greensboro and is currently employed at Wilson County School (NC) as a mathematics teacher. She is now broadening her educational impact by engaging in curriculum mapping for her county. This endeavor enriches her understanding of educational strategies and their implementation. With a strong commitment to quality education, she actively participates in the review process of educational quizzes, ensuring accuracy and relevance to the curriculum.

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• Current Version
• Jan 30, 2024
Quiz Edited by
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Expert Reviewed by
Janaisa Harris
• May 28, 2007
Quiz Created by
Mabuse

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