How can the pythagorean theorem be used to solve problems?

Pythagoras theorem ... The thing I hate the most ...

In a traingle if you know two if its sides (we say A and B) you square them and get the third side C.

You didn't understand.

Let me explain.

We have a triangle, one side is 4cm other is 3cm how do you find the third side?

Yes, Pythagoras theorem.

That is a^2 + b^2 = c^2.

You square 4 and 3:

That will be 16 and 9 then you add them.

16+9 = 25 find the root of 25 that is 5.

You get the third side as 5cm.

That's how you use Pythagoras theorem.