The Pythagorean Theorem states that in any right triangle, the square of the length of its hypotenuse is equal to the sum of squares of its other two sides: c^2 = a^2 + b^2. If you know the side ...

National 5; Using the sine and cosine rules to find a side or angle in a triangle The sine rule. The sine rule can be used to find an angle from 3 sides and an angle, or a side from 3 angles and a ...