With its three sides and three angles, the triangle is one of the most basic shapes in geometry. This means calculating the area of a triangle is a fundamental skill in geometry, with multiple ...

Save guides, add subjects and pick up where you left off with your BBC account. The base and the perpendicular height are at right angles to each other. The measurements used must be in the same units ...

To calculate the area of a rectangle you multiply the length by the width. A right-angled triangle is like half a rectangle. So to calculate the area of a triangle, you can work out the area of the ...