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17 votes
Find m21.
57
93
132
123

Find m21. 57 93 132 123-example-1
User Pankaj Jha
by
7.8k points

1 Answer

6 votes

Answer:

  • 123°

Explanation:

Angle 1 is the exterior angle of the pictured triangle.

As we know the exterior angle is equal to sum of non-adjacent interior angles:

  • m∠ 1 = 60° + 63°
  • m∠ 1 = 123°
User Per Noalt
by
7.6k points