Drappo's Radius, Diameter and Circumference Review

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

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 an edge of a circle to another edge through the center.

If my radius is 10ft, what is my diameter?

• 20ft

• 5ft

• 31.4ft

If my diameter is 19 inches, what is my radius?

• 38 inches

• 9.5 inches

• 59.66 inches

If my radius is 2 yd what is the circumference?

• 4 yd

• 1 yd

• 12.56 yd

If my diameter is 90cm, what is my circumference?

• 282.6cm

• 180 cm

• 90cm

If my circumference is 37.68cm, what is my diameter?

• 12cm

• 118.3152cm

• 37.68cm

If my circumference is 50.24ft, what is my radius?

• 8ft

• 16ft

• 25.12ft

An electric fan has a diameter of 10 inches. Find the area of this fan.

• 78.5 sq. in.

• 314 sq. in.

• 31.4 sq. in.

If my circumference is 163.28ft, what is my radius?

• 52ft

• 26ft

• 3.14ft