How would you work out the length of an hypotenuse, if the length of the opposite side is 3 cm and the length of the opposite side is 4 cm?

You would use Pythagoras theorem, which states, a^2 + b^2 = c^2. Where a is the opposite side to the angle, b is the side adjacent to the angle and c is the hypotenuse.

So if a = 3 cm, and b = 4 cm, c^2 would equal: 3^2 + 4 ^2 = 9 + 16 = 25. If c^2 = 25, then c = 5. Therefore the length of the hypotenuse is 5cm.

OA

Related Maths GCSE answers

All answers ▸

How do I solve two simultaneous equations?


Jules buys a washing machine. 20% VAT is added to the price of the washing machine. Jules then has to pay a total of £600 What is the price of the washing machine with no VAT added?


Given a right-angled triangle with an angle of 35 degrees and an Opposite side of 12cm, calculate the length of the hypotenuse to 3 significant figures.


16cos30° - 5tan60° = √x. Find the value of x.