Semicircle Area Calculator

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About this app

You can rapidly get the area of half a circle with our semicircle area calculator. Furthermore, the tool functions as a semicircle perimeter calculator, so entering a radius or diameter will help you identify the shape’s essential properties in the blink of an eye. In the article below, we define a semicircle and explain how to calculate its perimeter and area.

What is a semicircle? Semicircle definition
A semicircle is just half a circle. A semicircle is made by cutting a circle along a diameter line – or, in other words, through the circle center. The prefix semi– emanated from Latin and means “half” or “partially” (like in words such as semi-permanent, semi-formal, semifinals). You won’t forget what a semicircle is now that you know the etymology. Simply remember how the semifinals are related to the finals, and you’ll learn how to connect a semicircle to a circle.