Good ideas and conversation. No ads, no tracking. Login or Take a Tour!
When you have a right angled triangle, and you know the length of 2 sides (any), you can calculate the length of the 3rd one because this guy (PYTHAGORES) worked really hard to prove there's a formula that's always true with a right angled triangle. That's the formula: a² + b² = c² c is the side opposite of the right angle, a and b are the 2 other sides. Plug in the numbers, do the algebra (you need help with that too or is it fine?) and you should have the length of whatever side you were looking for. WHY? Well, there's a whole theorem with geometric proofs and all that makes this relationship alway true. Not sure how much expelnation of that you need if all you do is applying the formula.