Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 4 - No. 46)
Which of the following is required to calculate missing side lengths using the Pythagorean theorem?
The lengths of two sides
The measure of one angle
The area of the triangle
An understanding of trigonometric ratios
Explication
To apply the Pythagorean theorem, you must know the lengths of two sides.