Unit 7 Lesson 1 HW

What is the formula for the circumference of a circle using the radius?

• C = 2πr

• C = πd

• C = 2πd

What is the definition of a diameter?

• The distance from the center of a circle to any point on the circle

• The distance across a circle through the center

• The distance around a circle

• A tool used to construct circles

What is the value of Pi (π) approximately?

• 3.14

• 2.71

• 1.62

• 3.00

What is the circumference of a circle if the diameter is 10 units?

• 31.4 units

• 20 units

• 15.7 units

• 25 units

What is the formula to find the circumference of a circle using the diameter?

• C = 2πr

• C = πd

• C = 2πd

If the diameter of a circle is 12 inches, what is the circumference? Use π = 3.14.

• 37.68 inches

• 36.00 inches

• 38.00 inches

• 35.50 inches

If the radius of a circle is 14 cm, what is the circumference? Use π = 3.14.

• 87.92 cm

• 88.00 cm

• 85.00 cm

• 90.00 cm

If the radius of a circle is 3.5 cm, what is the circumference? (Use π ≈ 3.14)

• 21.98 cm

• 11 cm

• 22 cm

• 10.99 cm

A circle has a diameter of 16 ft. What is the circumference? (Use π ≈ 3.14)

• 50.24 ft

• 48 ft

• 51 ft

• 49.5 ft

If the diameter of a circle is 15 inches, what is the circumference? (Use π ≈ 3.14)

• 47.1 inches

• 45 inches

• 46.5 inches

• 48 inches