Mathematics for IGCSE & O level - Geometrical Constructions (Section 1 - No. 47)
Which of the following is true about the relationship between the acute angle and the reflex angle that make up the same angle?
They are equal.
They add up to 180°.
They add up to 360°.
They are supplementary.
Explication
An acute and reflex angle make a full rotation and add up to 360°.