Circumference and Area of Circles and Polygons

Find the area of the shaded region using the formulas.

• (4 x 8) + (3.14 x 1²)

• (3.14 x 1²) - (4 x 8)

• (4 x 8) - (3.14 x 2²)

• (4 x 8) - (3.14 x 1²)

You have two circles. Each circle has a diameter of 8. What is the total area of the two circles?

• 50.24

• 100.48

• 200.96

• 401.92

You buy a pizza. The diameter of the pizza is 16 Inches. You only eat half of the pizza. how many square inches of pizza did you eat?

• 200.96

• 100.48

• 48

• 24

Find the composite area.

• 6.28

• 24

• 40

• 38.28

Find the composite area.

• 72.12

• 146.24

• 96

• 121.12

A circular fountain has a drain in the center. The distance from the drain to the edge of the fountain is 3 feet. What is the approximate circumference of the fountain?

• 6 feet

• 9 feet

• 15 feet

• 18 feet

A semicircle opening above the entrance at Six Flags has a diameter of 15 feet.  What is the area of this opening?  Round to the nearest tenth.

• 706.5 square feet

• 47.1 square feet

• 88.3 square feet

• 176.6 square feet

The line segment between the center and a point on the circle

• Radius

• Diameter

• Chord

• Tangent

Find the diameter of the circle to the nearest hundredth. π = 3.14

• 31.40m

• 1.59m

• 3.20m

• 3.18m

Find the area of the circle to the nearest tenth. π = 3.14

• 1133.5cm²

• 119.3cm²

• 4534.2cm²

• 59.7cm²