Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 4 - No. 8)

In the context of finding lengths and angles in 3 dimensions, which method is primarily used?

Area calculations

Pythagoras' theorem in right-angled triangles

The Law of Sines

The Law of Cosines

Finding lengths and angles in 3 dimensions primarily involves identifying right-angled triangles and using Pythagoras' theorem.