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Circle = pi*42 = 50.27 cm2
Semi-circle = (pi*5.52)/2 47.52 cm2
The circle has the greatest area.
Half the diameter of a circle called the semicircle
The diameter of the semicircle will be twice the radius.
To find the perimeter of the curved section of the semi-circle: Perimeter of semicircle = Pi x radius If you also need to the find the perimeter of the straight part of the semicircle (the diameter), it is simply double the radius.
A semicircle is half a circle, so its area is half that of a circle: radius = 1/2 diameter = 22 ÷ 2 = 11 area = 1/2πr2 = 1/2π112 ~= 190 sq in
The diameter of a circle is twice its radius
Half the diameter of a circle called the semicircle
The diameter of the semicircle will be twice the radius.
Radius is = to half the diameter so.... when the radius of the semicircle is 5ft then the diameter is 10ft.
A semicircle is half a circle. So the perimeter of a semicircle is half the circumference of the whole circle plus the diameter, which is twice the radius: perimeter = 1/2 x 2{pi}r + 2r perimeter ~= 3.14x8 + 2x8 ~= 41.13cm
To find the perimeter of the curved section of the semi-circle: Perimeter of semicircle = Pi x radius If you also need to the find the perimeter of the straight part of the semicircle (the diameter), it is simply double the radius.
it is have the diameter
A semicircle is half a circle, so its area is half that of a circle: radius = 1/2 diameter = 22 ÷ 2 = 11 area = 1/2πr2 = 1/2π112 ~= 190 sq in
It is half of a circle; the circle's radius (and that of the semicircle) is 10 cm.
The area of a semicircle is half of the area of a circle. The area of a circle is pi x radius x radius. So the area of a semicircle is 1/2 x pi x radius x radius or (pi x radius x radius) / 2.
The diameter of a circle is twice its radius
The radius of a circle is half the diameter so if the radius of a circle is r, then the diameter is 2r.
The answer will depend on what measure of the semicircle is 5 inches: its radius or diameter.