How do you use Pythagoras' Theorem?

Pythagoras' Theorem states that h2 = a+ b2 . This is where you have a right angled triangle, with sides a, b and h where h is the hypotenuse. For example, if we had a triangle with sides of length 3 and 4, and we are trying to find the hypotenuse we would first find h2. This means that h2 = 3+42so h2 = 9 + 16so h2 = 25therefore the hypotenuse is the square root of 25, so in this case, the hypotenuse would be 5.

RB
Answered by Ryan B. Maths tutor

4919 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

A line intercepts point A at (4,4) and point B (8,12). Find the gradient and the intercept of the line.


(x+2)(x-3) expand and simplify


There are 11 pens in a box. 8 are black and 3 are red. Two pens are taken out at random without replacement. Work out the probability that the two pens are the same colour.


A flight travels at 750kmph for 7 hours and 18 minutes, work out the distance travelled? Then convert 750 km/h into metres per second.


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning