Question 1

Which of the following best describes a circle in mathematical terms?

Accepted Answer

A collection of all points in a plane that are a fixed distance from a fixed point.

Question 2

If the radius of a circle is $$r = 7 cm$$, what is the diameter?

Accepted Answer

$$14 cm$$

Question 3

Which of the following is NOT a property of a sphere?

Accepted Answer

It is a collection of points in a plane at a fixed distance from a center.

Question 4

A circle has a diameter of $$10$$ meters. What is the length of its radius?

Accepted Answer

$$5$$ meters

Question 5

Which of the following statements about polygons is TRUE?

Accepted Answer

A polygon is a plane shape made up of a finite number of line segments.

Question 6

Which of the following is a regular polygon?

Accepted Answer

A hexagon with all sides and angles equal.

Question 7

A quadrilateral has four right angles and all sides of equal length. What is it called?

Accepted Answer

Square

Question 8

Which of the following best describes a parallelogram?

Accepted Answer

A quadrilateral with opposite sides parallel.

Question 9

Which of the following triangles has all sides of equal length?

Accepted Answer

Equilateral triangle

Question 10

In a right triangle, what is the side opposite the right angle called?

Accepted Answer

Hypotenuse

Question 11

Which of the following is a property of an isosceles triangle?

Accepted Answer

It has at least two sides of equal length.

Question 12

A quadrilateral with exactly one pair of parallel sides is called a:

Accepted Answer

Trapezoid

Question 13

Which of the following best describes an acute triangle?

Accepted Answer

A triangle all of whose angles are less than $$90^\circ.$$

Question 14

If two circles meet at exactly one point, what is this point called?

Accepted Answer

Point of tangency

Question 15

Which of the following is NOT a quadrilateral?

Accepted Answer

Pentagon

Question 16

A sphere has a radius of $$r = 4 cm. $$What is its diameter?

Accepted Answer

$$8 cm$$

Question 17

Which of the following best describes a regular polygon?

Accepted Answer

A polygon with all sides and all angles equal.

Question 18

Which of the following is a property of a rhombus?

Accepted Answer

All sides are the same length.

Question 19

If two spheres meet along a circle, what does this mean about their intersection?

Accepted Answer

Their surfaces intersect in a circle.

Question 20

Which of the following is a three-sided polygon?

Accepted Answer

Triangle

Circles, Spheres, and Polygons: Key Concepts and Definitions

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