Circumference and area of circles

Use pi with the radius or diameter and know when a problem wants circumference and when it wants area.

Standards:7.G.B.4

Try it: three questions

Real questions from the practice bank. Tap an answer to check it.

Question 1 of 3

A circular garden has a radius of 5 meters. What is its circumference?

Question 2 of 3

A circular garden has a radius of 5 meters. What is the circumference of the garden?

Question 3 of 3

A circular garden has a radius of 7 meters. What is the circumference of the garden?

How this fits in

Circumference and area of circles is one skill in the Basic Geometry unit. Students read the unit lesson, then earn a bronze, silver, or gold medal on their last 10 answers. Medals never go down. A mastered unit comes back for review after 1, 3, 7, 16, and 35 days so it stays learned.

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