Question

Explain why the sum of a and b must be 180°.
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Answer 1

Answer:

because this is co interior angle and the each pair of corresponding angle measure 180 degree

hope it will help you..

Answer 2

Answer

in this ques two line are parallel and cut by a transversal

A + B = 180°

because a and b are co interior angle and according to the rule the sum of two co- interior angles must be 180° .

HOPE ITS HELFUL FOR U