Area, Circumference, Arc Length

Which of the following is used to find the area of a circle?

Which of the following is used to find the circumference of a circle?

Which of the following is used to find the arc length in a circle?

When finding the area of a shape, your label should be units².

• True

• False

A circle has a diameter of 80. What is the radius?

• 80

• 40

• 160

• 20

A circle has a radius of 74. What is the diameter?

• 37

• 148

• 74

• 185

What is the area of this circle?

• 163.2
• 15.3
• 124.2
• 113.1

What is the area of this circle?

• 1385.44
• 2142.12
• 5541.77
• 1289.12

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

• 10.5 ft
• 42 ft
• 65.94 ft
• 131.95 ft

The diameter of a quarter is 24.26 mm. What is closest to the circumference of the outer edge of the quarter? Use 3.14 for Pi.

• 76.18 mm

• 38.01 mm

• 463 mm

• 1,848 mm