Circle Diameter and Radius

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

• Radius

• Diameter

The diameter is...

• twice the radius

• half the radius

• 4 times the radius

• the radius squared

Tags

CCSS.HSG.C.A.2

The radius of a circle is

• The measurement from the center of a circle to an edge of the circle.

• The measurement around the circle

• The measurement from and edge of the circle to another edge through the center

• A line perpendicular to the diameter of the circle

Tags

CCSS.HSG.C.A.2

Swimming from one side of this pool through the center to the other side is 12 feet. What is the radius of this pool?

• 32 ft

• 6 ft

• 4 ft

• 12 ft

Tags

CCSS.7.G.B.4

From the center of this CD to the edge of the CD is 4 inches. How far is the distance all the way across the CD?

• 16 in

• 8 in

• 12 in

• 2 in

Tags

CCSS.7.G.B.4

The radius of this coin is 7 mm. What is the diameter?

• 3.5 mm

• 14 mm

• 21 mm

• 49 mm

Tags

CCSS.7.G.B.4

The diameter of a circle is:

• The measurement around the circle.

• The distance from an edge of a circle to another edge.

• The distance from the center of the circle to an edge of a circle

• The distance from an edge of a circle to another edge through the center. 

Tags

CCSS.HSG.C.A.2

What is the diameter?

• 5 in

• 10 in

• 3.14 in

• 15.84 in

Tags

CCSS.7.G.B.4

If I want to cut this pizza in half, the line would be 16 in long. How far do I need to cut if I just want a slice from the center?

• 32 in

• 4 in

• 12 in

• 8 in

Tags

CCSS.7.G.B.4

What is the radius of this circle?

• 6

• 4

• 3

• 0

Tags

CCSS.7.G.B.4