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.
