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30 cm.
How to calculate the surface area from this half circle

30 cm. How to calculate the surface area from this half circle-example-1
User RPM
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Explanation:

A semi-circle is half of a circle. Therefore, to find the area of a semi-circle, you just have to find the area of a full circle and then divide it by two. It will be faster than you think.[1]

User Matthew Molloy
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