Adding and Subtracting Rational Expressions

What is the formula for the area of a circle?

• Area = radius * diameter

• Area = pi * radius squared

• Area = 2 * pi * radius

• Area = pi * diameter

If the diameter of a circle is 6 yards, what is the radius?

• 6 yards

• 3 yards

• 1.5 yards

• 12 yards

How do you calculate the area of a circle if given the diameter?

• Multiply pi by the square of half the diameter

• Multiply pi by the diameter

• Divide the diameter by pi and square the result

• Multiply the diameter by itself and then by pi

What is the area of a circle with a radius of 13 kilometers?

• 42.25 km squared

• 26 km squared

• 530.66 km squared

• 169 km squared

What is the correct way to find the radius from the diameter?

• Multiply the diameter by pi

• Divide the diameter by 2

• Multiply the diameter by 2

• None of the above

What is the area of a circle if the radius is 7.5 yards?

• 15 yards squared

• 22.5 yards squared

• 56.25 yards squared

• 176.625 yards squared

What is the area of a semicircle with a radius of 12 cm?

• 226.08 cm squared

• 452.16 cm squared

• 144 cm squared

• 72 cm squared

For a circle with a diameter of 5 feet, what is the radius?

• 1.25 feet

• 10 feet

• 5 feet

• 2.5 feet

How many bags of fertilizer are needed for a garden with a diameter of 16 feet, if one bag covers 30 square feet?

• 8 bags

• 6 bags

• 5 bags

• 7 bags

If a table has a diameter of 6 feet and needs a tablecloth that hangs 1 foot off each side, what is the new diameter?

• 8 feet

• 7 feet

• 6 feet

• 9 feet