Question

in fig. 10.48, AB||DC. find measures of ∆A and ∆B​

Answer 1

Answer:

angle A= 110° , angle B= 70°

Step-by-step explanation:

opposite angles of a quadrilateral is congruent

angle C = angle A

angle A= 110°

AB || DC

on transversalAB

angle A + angle B = 180 ....... interior angles theorem

110°+ angle B = 180

angle B= 70°

hope that's was helpful

Answer 2

Answer:

∠A = 90° & ∠B = 70°

Step-by-step explanation:

∵ AB||DC

∴∠A + ∠D = 180

=> ∠A = 180°- 90° = 90°

||ly ∠B = 180° - 110° = 70°

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