Question

find angle abd........,.​

Answer 1

The figure above shows an isosceles Trapezium.

The adjacent angles are complementary.

Hence :

Angle ABD + Angle BDC = 180°

=> 2 Angle ABD = 180°

=> Angle ABD = 90°......(A)

Answer 2

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Isosceles Trapezium :-

ACD = 90°

Given :-

AB = CD

AC = BD

AD = BC

To Find :- ABD

Adjacent angles are complementary = 180°

ABD + ACD = 180°

ABD + 90° = 180°

ABD = 180 - 90°

ABD = 90°