Q16 of 76 Page 11

In Fig. 10.138, if AE||DC and AB=AC, the value of ∠ABD is

∠EAP = ∠BCA (Corresponding angles)

∠BCA = 70°


∠CBA = ∠BCA (Angles opposite to equal sides are equal)


∠CBA = 70°


Now,


∠ABD + ∠CBA = 180°


∠ABD + 70 = 180°


∠ABD = 110°

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