Question

Recognise the type of angles in the following figures:

Answer 1

(i) Straight angle (an angle of ${180}^o$)

(ii) Alternate Interior Angle: They are congruent. They are two interior angles which lie on different parallel lines and on opposite side of a transversal. Parallel lines cut by a transversal.

(iii) Reflex angle: It is the larger angle. It is more than ${180}^o$ but less than ${360}^o$.