If in a triangle, there is one angle 90, we use Pythagoras Theorem.
Also, if we know 1 or 2 sides a triangle, and we need to find the 3rd side, we check if we can apply Pythagoras theorem. So, we check if one angle of a triangle is 90 and then apply Pythagoras.
Teachoo is free. Login to view more pages.
Login with facebook
Login with gmail
On signing up you are confirming that you have read and agree to
Terms of Service