Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 3 - No. 35)
If you know two sides of a right triangle, which theorem can you use to find the third side?
Law of Sines
Law of Cosines
Pythagorean Theorem
Euclidean Theorem
Explication
The Pythagorean theorem is a^2 + b^2 = c^2