A semi circle has a radius of 5cm. What is the area of the semi circle?
1 answer:
Hello!
We know that the formula for area of a circle is:
A = pi × r^2
A semi circle is half of a circle, which means that its formula would be have of a circles as well.
Formula for area of a semi circle:
A = (pi × r^2) / 2
We'll use the same formula for a semi circle, only we'll divide it by 2 since it's a half circle.
A = (pi × r^2) / 2
A = (3.14 × r^2) / 2
A = 78.5 / 2
A = 39.25
ANSWER:
The area of the semi circle is C.) 39.25 centimetres squared.
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