2d Geometry Vocabulary

1. What is an acute angle?

A 90 degree angle.

An angle that is greater than a right angle.

An obtuse angle.

An angle that is less than a right angle

An acute angle is any angle less than 90 degrees, making it smaller than a right angle (90 degrees). An angle that is greater than a right angle would be obtuse, not acute.

Explanation

An acute angle is any angle less than 90 degrees, making it smaller than a right angle (90 degrees). An angle that is greater than a right angle would be obtuse, not acute.

2. What is an angle?

A type of fruit.

A unit of measurement for weight.

A type of dance move.

Where 2 lines meet on a plane figure

An angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.

Explanation

An angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.

3. What are attributes?

Attributes are constants used in mathematical equations.

Attributes are values used in programming languages.

A characteristic of a shape such as a triangle has 3 sides

Attributes are qualities possessed by living organisms.

Attributes refer to characteristics or properties associated with an object, entity, or concept. In the context of shapes, attributes describe specific features like the number of sides in a triangle.

Explanation

Attributes refer to characteristics or properties associated with an object, entity, or concept. In the context of shapes, attributes describe specific features like the number of sides in a triangle.

4. What is a circle?

A square with curved edges.

A triangle with a circular outline.

A shape with no defined center or circumference.

A plane figure in which all the points are the same distance from a point called the center

A circle is specifically defined as a plane figure with all points equidistant from the center.

Explanation

A circle is specifically defined as a plane figure with all points equidistant from the center.

5. What are congruent figures?

Figures that have neither the same size nor shape.

Figures that have the same size and shape

Figures that have the same size but different shapes.

Figures that have different sizes but the same shape.

Congruent figures are identical in both size and shape, meaning they have the exact same dimensions and angles. Any differences in size or shape would make the figures non-congruent.

Explanation

Congruent figures are identical in both size and shape, meaning they have the exact same dimensions and angles. Any differences in size or shape would make the figures non-congruent.

6. What is an equilateral triangle?

A triangle with 3 equal sides

A triangle with 4 equal sides.

A triangle with no equal sides.

A triangle with 2 equal sides and 1 unequal side.

An equilateral triangle is a specific type of triangle where all three sides are of equal length, making it distinct from other types of triangles. It is important to understand the definition and characteristics of an equilateral triangle to differentiate it from other geometric shapes.

Explanation

An equilateral triangle is a specific type of triangle where all three sides are of equal length, making it distinct from other types of triangles. It is important to understand the definition and characteristics of an equilateral triangle to differentiate it from other geometric shapes.

7. What is a hexagon?

A polygon with 8 sides.

A polygon with 6 sides

A shape with 4 sides.

A polygon with 5 sides.

A hexagon is a polygon with 6 sides, making it distinct from polygons with fewer or more sides. In this case, options 2, 3, and 4 have an incorrect number of sides compared to a hexagon.

Explanation

A hexagon is a polygon with 6 sides, making it distinct from polygons with fewer or more sides. In this case, options 2, 3, and 4 have an incorrect number of sides compared to a hexagon.