Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

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Area and Perimeter of Circles - Problem 1

Alissa Fong
Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

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The area of a circle is pi times the radius squared, and the circumference of a circle is either pi times the diameter or 2 pi times the radius. If you leave the Greek letter pi in your answer, you'll have an exact answer, whereas if you use 3.14 as an approximation for pi, you'll have an approximate answer.

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