Unit 10 Review

A line that goes from one end of the circle to the other and crosses the center point.  

• center
• diameter
• dime eater
• radius

What is the area of a semicircle with a diameter of 8 cm?

• 16π
• 8π
• 64π
• none of the above

Find the area of the circle below.

• 6π
• 12π
• 24π
• 9π

Find the area of the circle. Round to the nearest hundredth: a circle with radius 48 mm

• 7,238.23 mm²
• 150.80 mm²
• 7,934.59 mm²
• 301.59 mm²

_{Find the Circumference.}

• 31.4 in
• 78.5 in sq
• 15.7 in
• 3.14 in 

What is the circumference?

• 50
• 25
• 24
• 201

A circular swimming pool is 21 feet in diameter. How many feet around is the pool?

• 10.5 ft
• 1385.44 ft
• 65.97 ft
• 131.95 ft

Danielle wants to buy cookies for her friend. The radius of a cookie is 5 inches. What is the cookie’s 
circumference?

• 10 in
• 2.5 in
• 15.7 in
• 31.4 in 

Alison is jogging on a circular track that has a radius of 140 feet.  She runs along the track from point R to point N, a distance of 230 feet. Find to the nearest degree, the measure of minor arc RN.

• 47
• 74
• 94
• 123

Find the area of the shaded sector of circle O.  The radius is 6 inches and the central angle is 100°.  Express answer to the nearest tenth of a square inch.

• 9.2 sq. in.
• 10.5 sq. in.
• 31.4 sq. in.
• 38.2 sq. in.