Intro to Circles and Circumference

True or False: One of the equations for Circumference is C = 2πr.

• True

• False

Tags

CCSS.7.G.B.4

True or False: One of the equations for Circumference is C = πd.

• True

• False

Tags

CCSS.7.G.B.4

A circle is the set of all points in a plane that are the same distance from a given point, called the _________________.

• middle

• point

• center

• segment

The distance across a circle through its center is the __________________.

• diameter

• radius

• chord

• segment

The distance from the center of a circle to any point on the circle is the ___________.

• radius

• circumference

• diameter

• tangent

What is the radius?

• 18 ft.

• 72 ft.

• 38 ft.

• 14 ft.

Tags

CCSS.7.G.B.4

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

Tags

CCSS.HSG.C.A.2

If my diameter is 25 inches, what is my radius?

• 50 inches

• 12.5 inches

• 78.5 inches

• 25 inches

Tags

CCSS.7.G.B.4

What is the length around a circle called?

• the radius

• the diameter

• the circumference

What is the radius?

• 18

• 72

• 14

Tags

CCSS.7.G.B.4