What is a semicircle & what does it mean – learn how to find the radius, diameter, area, perimeter (circumference), arc length, & inscribed angle with formula Learn how to identify a semicircle and find its area and perimeter using formulas and examples. A semicircle is half of a circle and its perimeter is the sum of half of the circumference and the diameter. Learn how to calculate the perimeter of a semicircle using the formula πr + 2r , where r is the radius. Explore step-by-step examples for finding perimeter with given radius, diameter, and solving for radius when perimeter is known. Perimeter of a semicircle is the sum of half of the circumference of a circle and the diameter. Learn the definition, formula, facts, examples, and more.

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