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Earn +20 ptsQ: How do you calculate the area and perimeter or semi circles?
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Continue Learning about Math & Arithmetic
Who discover herons formulas?
In geometry, Heron's (or Hero's) formula, named after Heron of Alexandria, states that the area A of a triangle whose sides have lengths a, b, and c is square root of semi perimeter multiply by semi perimeter minus a multiply by semi perimeter minus b multiply by semi perimeter minus c.
What is formula of perimeter of semi circle?
The perimeter of a circle has the formula 2πr. Therefore the length of a semi circle is πr. But the perimeter of a semi circle also includes the diameter which is 2r. Therefore the perimeter of a semi circle = πr + 2r = r(π + 2)
What is the answer to finding the area of 4 semi-circles with the diameter of 10 centimeters?
-6
How do you find the area of a rectangle with a semi circle attached to it?
Calculate the area of a rectangle and of the semicircle separately, then add.
How do you find the perimeter for a semi circle?
Its perimeter is half of its circumference plus its diameter
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