Question

please tell me both step by step question 79and80​

Answer 1

79. Answer is (2) angle A + angle D = 180 degrees

because sum of two opposite sides any quadrilateral (figure made by 4 line segments) is 180 degrees

Answer 2

Answer:

79. (2) since the pair of interior angles on the same side of the transversal is supplementary.

80.(4) since the pair of interior angles on the same side of the transversal is supplementary. The diagnols of an isoceles triangle are equal. Oppsite angles in an isoceles trapezium are equal