2r vs r squared

What is the formula to find the diameter of a circle from its radius?

• r^2

• r/2

• r+2

• 2r

If the radius of a circle is 5 cm, what is its diameter?

• 20 cm

• 15 cm

• 25 cm

• 10 cm

If the radius of a circle is 8 units, what is its diameter?

• 12 units

• 16 units

• 20 units

• 4 units

Find the diameter of a circle with a radius of 12 meters.

• 12 meters

• 24 meters

• 36 meters

• 48 meters

Calculate the diameter of a circle with a radius of 15 inches.

• 45 inches

• 20 inches

• 10 inches

• 30 inches

What is the formula to calculate the square of the radius of a circle?

• radius + radius

• radius / radius

• radius * radius

• 2 * radius

If the radius of a circle is 6 cm, what is its squared value?

• 36

• 12

• 30

• 18

If the radius of a circle is 9 units, what is its squared value?

• 36

• 81

• 18

• 27

Find the squared value of a circle with a radius of 4 meters.

• 8 square meters

• 20 square meters

• 16 square meters

• 12 square meters

Calculate the squared value of a circle with a radius of 7 inches.

• 35 square inches

• 56 square inches

• 14 square inches

• 49 square inches