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# Semicircle

TopSemi Circle is a half round shape Geometry like half plate shape. Now we discuss different semi circle formulas and their uses–
Diameter of semi circle = 2 * (radius / 2),

Suppose we have a semicircle, whose radius is 7 inch, then-
Diameter of the semicircle = 2 * (7 / 2),
= 7 inch.
So, diameter of the semicircle is 7 inch, whose radius is 7 inch.

Area of semicircles = π * (r / 2) * (r / 2),

Suppose we have a semicircle, whose Diameter is 24 inch, then,
Now first of all, we calculate radius of given semicircle is–
Radius = (24 / 2) = 12 inch,
So, radius of given semicircle is 6 meter, now we use following area of semicircle formula for evaluating area of semicircle –
Area of semicircles = π * (r / 2) * (r / 2),
= 3.14 * 6 * 6,
= 113.04.
Therefore area of semicircle is 113.04 inch2, whose diameter is 24 inch.
Circumference of semicircle = 2 * π * (r / 2),

Suppose we have a semicircle, whose radius is 7 inch, then we apply circumference of semicircle formula for evaluating circumference of semicircle –
Circumference of semicircle = 2 * π * (r / 2),
= 2 * 3.14 * (7 / 2),
= 21.98.
So, circumference of semicircle is 21.98, whose radius is equal to 7 inch.
For evaluating the Arc Length of semicircle, we use following formula–
Arc length of semi circle (s) = (radius / 2) * central angle,

Suppose we have a semi circle, whose radius is 7 inches and central angle is 60 degree, then –
Arc length of semi circle (s) = (radius / 2) * central angle,
= (7 / 2) * (π/180 * 60)
= 3.5 * π/3,
= 3.5 * 1.04,
= 3.64 inch.
So, arc length of a semi circle is 3.64 inch, whose radius is 7 inches and central angle is 60 degree.