A a a² a. Using the formula for the area of an equilateral triangle and side length 10. Since each side of a square is the same it can simply be the length of one side squared.
The width is 5 and the height is 3 so we know w 5 and h 3.
As with the formula for the area of a circle any derivation of this formula inherently uses methods similar to calculus. Area 5 3 15. The rectangle has an area of 15. How to calculate the area of a parallelogram.