Area 1 2 ab sin C Area 1 2 bc sin A Area 1 2 ca sin B. Area w h. Finding circumference of a circle when given the area.
So you multiply ½ the base length by the height.
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. ½ b is half the base length of the triangle and h is the height of the triangle. In this case you can do 7x7 to work out the area of the. Area is calculated by multiplying the length of a shape by its width.