Circles and Semicircles

Find the area of this Semicircle with a diameter of 18 cm

• 254.34 cm

• 127.17 cm

• 56.52 cm

• 28.26 cm

If you are given the diameter, how can you calculate the radius?

• Multiply the diameter by 2

• Subtract 2 from the diameter

• Add 2 to the diameter

• Divide the diameter by 2

A _____ is half of a circle.

• circumference

• pi

• semicircle

• composite figure

The stained glass window is a semicircle. What is the distance around the window?

• 40.82 inches

• 66.82 inches

• 81.64 inches

• 107.64 inches

​ (a)   - a half circle; created by an arc whose measure is equal to 180 degrees

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• Semicircle

• Arc Measure

• major arc

• minor arc

• diameter

• semi circle

• tangent line

• circle

• radius

What is the measure of the angle of the circle?

Which arcs are semicircles? Check all that apply.

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Which arcs are semicircles? Check all that apply.

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Identify the SEMICIRCLES (mark ALL that appy)

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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.