How do you calculate the area of a triangle? To calculate the area of a triangle, multiply the height by the width (this is also known as the 'base') then divide by 2.

Explore the triangle area formula, its derivation, and practical examples to master this essential geometric concept effortlessly.

How to calculate the length of a side 𝒚 Here is an example of how to calculate the length of a side, y, when another side and an angle Ɵ is given in a right-angled triangle.