Unit 3 - Measuring Circles

the sum of the lengths of the sides of a polygon

• perimeter

• circumference

• area

• diameter

A straight line from the center to the circumference of a circle or sphere.

• radius

• diameter

• circumference

• perimeter

diameter

• the distance across a circle

• the distance around a circle

• middle

• a half of a circle or of its circumference.

The distance around a circle

• circumference

• area

• radius

• diameter

The dot represents....

• center

• radius

• diameter

• circumferene

Check all that apply regarding "Pi".

• 22/7

• 3.14

• approximately 3 times the diameter

• infinite

The ability of a figure to be rotated less than a full circle and exactly match its original image

• rotational symmetry

• design

• approximation

• area

A mathematical relationship or rule is expressed in symbols.

• formula

• area

• circumference

• radius

A number multiplied by itself

• squared

• formula

• semi-circle

• rotational symmetry

What is the radius of a circle that has a diameter of 48 inches?

• 24 inches

• 12 inches

• 6 inches

• 36 inches