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Semicircle is a half circle formed by cutting the circle into two halves. It is a circular arc that measures 180°, or π radians, or a half-turn. Learn about semicircles in detail here, including its shape, properties, formulas for Circumference and Area, and solved examples. Unlike a full circle, which is completely round, a semicircle includes both the curved portion and the linear base. The perimeter of a semicircle refers to the total boundary distance around this shape, calculated by summing the arc length and the diameter . Learn how to calculate the perimeter of a semicircle using the radius and a simple formula that combines curved and straight edges. Calculating the perimeter of a semicircle is easy if you follow these steps: Find the radius (r) of the semicircle . If you have the diameter, divide it by 2 to get the radius. Multiply π (3.14) by the radius: π × r. Add the diameter (2 × r) to your result from step 2: (π × r) + (2 × r)
