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5 votes
2. Find m21.
39°
1
30°
860

2. Find m21. 39° 1 30° 860-example-1

1 Answer

6 votes

Answer:

∠ 1 = 69°

Explanation:

The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.

∠ 1 is an exterior angle of the triangle, thus

∠ 1 = 39° + 30° = 69°

User Riley Finn
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