Area of a circle | Perimeter, area, and volume | Geometry | Khan Academy

If a circular candy has a diameter of 16 millimeters, what is its radius?

• 8 millimeters

• 16 millimeters

• 32 millimeters

• 4 millimeters

What is the area of a circular chocolate wafer with a diameter of 16 millimeters, expressed in terms of π?

• 8π mm²

• 16π mm²

• 64π mm²

• 256π mm²

If the diameter of a circular disc is measured in millimeters, what unit should be used for its area?

• millimeters

• square millimeters

• cubic millimeters

• centimeters

Using 3.14 as an approximation for π, what is the approximate area of a circular candy with a diameter of 16 millimeters?

• 25.12 mm²

• 50.24 mm²

• 200.96 mm²

• 401.92 mm²