Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 1 - No. 22)

If side a = 3 and side b = 4, what is the length of side c (hypotenuse)?

Using the Pythagorean theorem (a^2 + b^2 = c^2), 3^2 + 4^2 = 9 + 16 = 25, so c = √25 = 5