Question: What is the circumference of this circle, in centimeters? Use 22/7 for Pi.

A circle with diameter 21 centimeters.

Answer: 66

Question: John is putting a fence around his garden that is shaped like a half circle and a rectangle.

A rectangle has a length of 14 feet and width of 7 feet. A semicircle with diameter of 7 feet is on top of the rectangle.

How much fencing will John need? Use 22/7 for Pi.

Answer: 46 ft

Question: Which statement is true about the circumference of a circle?

Answer: The circumference is found by multiplying Pi by the diameter.

Question: The circumference of a circle is 36 pi feet. What is the length of the radius of this circle?

Answer: 18 ft

Question: What is the circumference of the circle? Use 3.14 for Pi.

A circle with radius 6.4 centimeters.

Answer: 40.192 cm