Circumference Radius Diameter of a Circle

Shring's dining room table is round and has a radius of 4.5 feet. What is the tabletop's area? Round to the nearest tenth.

What is the formula to calculate the area of a circle?

• A = πr

• A = 2πr

• A = πr^2

• A = 2πr^2

The picture shows 3 equal circles touching each other.

QV = 7.3 cm. Calculate the perimeter of the triangle QUS.

It measurement, in cm, will be:

• 43.3

• 44.1

• 43.5

• 43.8

The diameter of circle L is 20 units and the diameter of circle M is 13 units and QR = 4. Find LQ.

• 16 units

• 6 units

• 14 units

• 9 units

Determine the radius of the penny

• 59.66 mm

• 9.5 mm

• 38 mm

• 119.32 mm

The image shows two circles. The diameter of Circle A measures 5 cm, and it is the same as the radius of Circle B. What is the diameter of Circle B?

• 5 cm

• 25 cm

• 10 cm

• 12.5 cm

I wrapped a tape measure around the trunk of the tree and it was 14.13 feet. What is the diameter of the tree? Use 3.14 for pi. Round to the nearest hundredth.

• 2.25 ft

• 44.37 ft

• 4.5 ft

• 17.27 ft

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

• 282.6cm

• 180 cm

• 90cm

• 565.2cm

What is the diameter?

• 8

• 16

• 10

• 4

Steven purchases a bowl. The diameter of the
bowl is 14 cm. What is the circumference of the 
bowl?

• 28 cm

• 43.98 cm

• 87.96 cm

• 7 cm