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Finding the area of a circle from the radius

Teaching Transcript

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What's the area of a circle with a radius of 4?

The area of a circle is pi, times the square of the radius

We know our radius is 4, and 4 squared is 16, so our area is Pi times 16

Pi is about 3.14, so our area is 3.14 times 16, or 50.27

This math skill teaches how to calculate the area of a circle. It involves squaring the radius and then multiplying the result by Pi (approximately 3.14) to find the area.

Skill Practice

Finding the area of a circle from the radius

Test your understanding of finding the area of a circle from the radius by practicing it! Work through the below exercises to use it in practice.