Reference angles are essential for understanding trigonometric functions and solving various math problems in geometry, physics, and engineering. In this article, we’ll discuss what reference angles ...

To solve problems involving non-right-angled triangles, the correct rule must first be chosen. The cosine rule can be used in any triangle to calculate: a side when two sides and the angle in between ...

It is important to know properties of these shapes as questions will often involve knowing angle and length properties. For example, remember that each angle in an equilateral triangle is 60°. When a ...