Circle Area Diameter Radius Circumference

Find the length of the diameter. Only type the number.

The radius of a circle is 5 cm. 3x+7 represents the length of the diameter. Write an equation for x.

• 3x+7=5

• 3x+7=10

• 3x+7=7

• 3x+7=2.5

Find the area of this circle. Use 3.14 for pi. Only type the number.

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

• 38 inches

• 9.5 inches

• 59.66 inches

• 119.32 inches

If my radius is 2 yd what is the circumference?

• 4 yd

• 1 yd

• 12.56 yd

• 6.28 yd

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

• 282.6 cm

• 180 cm

• 90 cm

• 565.2 cm

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

• 52 ft

• 26 ft

• 3.14 ft

• 163.28 ft

What is the area of a circle with a radius of 3ft?

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

• 20ft

• 5ft

• 31.4ft

• 62.8ft

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

• 12 cm

• 118.3152 cm

• 6 cm

• 37.68 cm