Answer:
(a) 83°
Explanation:
You want the measure of angle 5, given that the adjacent angle 6 has a measure of 97° where the lines cross.
Linear pair
The two angles, 5 and 6, are a linear pair, so are supplementary.
∠5 = 180° -∠6
∠5 = 180° -97°
∠5 = 83°
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