A rectangular prism is a three-dimensional cuboid figure. In the same way that a triangular prism brings three connected lines to life in the real world, a rectangular prism takes the length and ...

So to calculate the area of a triangle, you can work out the area of the rectangle and then divide by 2. The formula for working out the area of a right-angled triangle is: b a s e × h e i g h t 2 ...