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Sagot :
Answer:
90 degrees
Step-by-step explanation:
here, 1 and 2 are examples of co - interior angles.
Co - interior angles are always supplementary.
given that co-interior angles in this case are equal.
hence, angle 1 = angle 2 = x
x + x = 180 (Co-interior angles are supplementary)
=> 2x = 180
=> x = 180/2
=> x = 90

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