πr² is the formula for finding the area of a circle. To find the area of a semicircle just divide the answer by two. So take the radius, square it, which in this case would be 100, multiply it by π [pi (3.14)] and divide it by two.
First find the circumference of the whole circle using Pi x diameter. Halve the answer and add the diameter. Thus: 3.1416 × 10 = 31.416 ÷ 2 + 10 = 25.708cm So the perimeter of the semi-circle is 25.7cm
100 sqcm
yes
Radius = diameter/2 = 5 cm
The area of a 10cm circle is 314.16cm2 ( squared)
It is half of a circle; the circle's radius (and that of the semicircle) is 10 cm.
The circle's area is 314.159 cm2
A = ~78.53cm2
The area is 7.95775cm2
314.1592653589793 cm3
The area is 314 cm2
You add the area of the square with the area of the semi circle.
semi means half A semi-circle is half a circle The formula for the area of a circle is A = (Π * r^2) Area of semi circle = (Π * r^2) ÷ 2
314.2 square cm
78.54 square cm
πr² is the formula for finding the area of a circle. To find the area of a semicircle just divide the answer by two. So take the radius, square it, which in this case would be 100, multiply it by π [pi (3.14)] and divide it by two.