You can find the area of a shape by counting how many units cover it. The equation for calculating the area of a circle is as follows. Put the base lengths and the height into the formula A ½ b 1 b 2h to find the area of the trapezoid.
Determine whether your given value is a diameter or a radius using the picture on the right and definitions available in the section above you can calculate area of a circle using diameter as well as radius.
More detail can be found regarding circles on the Circle Calculator page but to calculate the area it is only necessary to know the radius and understand that values in a circle are related through the mathematical constant p. Learn more about Area or try the Area Calculator. A triangle is a. The formula for finding the area of the trapezoid is.