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What is a Semi-Circle?
A semicircle is formed when a lining passing through the centre touches the two ends on the circle. Thus, by joining two semicircles we get a circular shape.
Semi Circle Shape
When a circle is cut into two halves or when the circumference of a circle is divided by 2, we get a semicircular shape.
Since a semicircle is half that of a circle, hence the area will be half that of a circle.
In the below figure, the line AC is called the diameter of the circle. The diameter divides the circle into two halves such that they are equal in area. These two halves are referred to as the semicircles.
Hard and easy math geometry puzzle.