Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 5 - No. 24)

In a right-angled triangle, what is the relationship between the sides and the angles?

Sides and angles are unrelated.

Trigonometric ratios relate sides and angles.

Angles determine side lengths directly.

Side lengths determine angles directly.

Trigonometric ratios provide the relationships between the sides and angles.