Areas and Circumference of Circles and Semicircles

Steven purchases a bowl. The diameter of the

bowl is 14 cm. What is the circumference of the

bowl? Round to the nearest hundredth. Don't forget to label.

Find the circumference of a circle with a radius of 12.5 mm. Round to nearest hundredth. Don't forget to label.

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

Find the area of the semicircle. Round you answer to the nearest hundredth.

• 19.63

• 9.8125

• 9.81

• 39.25

What is the circumference of a semicircle with a diameter of 14 cm (including the straight edge)?

Calculate the circumference of a semicircle with a radius of 5 feet (excluding the straight edge).

If a circle has a radius of 7 meters, what is the length of the arc of a semicircle?

what is the area of this semicircle ?
d = 8 cm 

• 100.48 cm²

• 80 cm²

• 200.96 cm²

• 25.12 cm²

What is the relationship between the diameter of a circle and its circumference?

• The circumference is twice the diameter.

• The circumference is half the diameter.