Question

in the given figure ABCD, find x if AB||CD​

Answer 1

Answer:

if AB ||CD

then angle A + angle C = 180°

x-20+x+20 = 180°

2x= 180°

x= 90°

Hope this would help you

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Answer 2

Step-by-step explanation:

If AB ll CD and Ac is transversal

Then , A + B =180 degree , because corresponding part of equal sides makes 180 degree

Therefore, x-20+x+20 = 180

x + x -20+20 = 180

2x = 180

x = 180/2

x = 90

Verify,

Put x = 90

90 -20 +90+20= 180