Question

ABCD is rectangle Find angle 1,2,3.
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Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Given:-ABCD is a rectangle and

angle 1 is 90°

to prove:- each angle is 90°

proof:-

ABCD is a parallelogram and

AB//CD and AD//BC .

AB//BC and and AB is transversal

therefore angle A+angle B =180°