Im Circles

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

• Multiply the diameter by 2

• Divide the diameter by 2

• Add 2 to the diameter

• Subtract 2 from the diameter

If the area of circle is 100 π , find the radius of the circle.

• 10 π

• 10

• 50

• 50 π

Find the area of the circle. Leave in terms of π.

• 18π in²

• 9π in²

• 81π in²

The diameter of the circle is 6 inches. What is the circumference? Leave in terms of π.

• 6π in

• 12π in

• 36π in

• 24π in

Find the area of the circle.

• 43.96

• 153.86

• 87.82

• 307.72

A circular table top has a radius of 3 feet. A decorative trim is placed along the outside edge of the table. How long is the trim?

• 6.28 feet

• 12.56 feet

• 18.84 feet

• 25.12 feet

The Carillo family has a circular swimming pool with a diameter of 10 feet. Find the area of the pool cover to the nearest tenth.

• 94 ft²

• 53.4 ft²

• 70.9 ft²

• 78.5 ft²

What is the radius of this circle?

• 12cm

• 6cm

• 24cm

• 3cm

The largest possible circle is to be cut from a 12 foot square board. What will be the approximate area, in square feet, of the inscribed circle? Round your answer to the nearest whole number.

• 72 ft²

• 113 ft²

• 144 ft²

• 324 ft²

The area of a circle is 153.86 m². What is the radius?

• 7

• 14

• 28

• 49