180-57= 123 is the measurement for angle 2
All straight line is equal to 180
Answer:
m∠1 = 123°
Explanation:
Since a straight line is always a supplementary angle, it equals 180°. To solve for the unknown angle, we can subtract the known angle from 180°.
180° - 57° = 123°
So m∠1 = 123°
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