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What is the formula for area of a half circle but you don't have the radius?
If you have the diameter, then the formula for the area of a semi-circle is:(pi x (diameter/2)2)/2That is,Divide the diameter in two to find the radius (diameter/2)Square the radius (radius x radius)Multiply it by pi (3.1416)Divide the answer by two to find half the circle.Remember your units. The answer will be in square inches, or square centimeters or square somethings.
How do you find the radius of a square mile?
Well the formula for the radius of the square is radius squared * pi (3.14)So find the radius (which is half of the diameter. which is exactly half of the shape)and do the formula. end the answer with "m".
What is the area of a circle if the diameter is 4 meters?
Using 3.14 as Pi the area of circle is: 12.56
If the diameter of the circle is 60 what is the radius?
The radius of a circle is always half of the diameter. Therefore, if the diameter of the circle is 60 units, the radius would be half of 60, which is 30 units. The formula to calculate the radius from the diameter is: radius = diameter / 2. In this case, the radius would be 30 units.
Find the radius of a circle which has a diameter of 3.6cm?
The radius of a circle is the distance from the center to an outside edge of the circle. The diameter is the distance all the way across the circle. Therefore, the radius is half the value of the diameter.
