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user100 [1]
3 years ago
12

3. Find m21. 1 140° 50°

Geography
1 answer:
egoroff_w [7]3 years ago
8 0

Explanation:

step 1. let called the acute angles inside the triangle <1 and <2.

step 2. <2 +140 = 180 (supplementary angle)

step 3. <2 = 40°

step 4. <1 + <2 + 90 = 180. (interior angles of a triangle = 180°)

step 5. <1 + 40 = 90

step 6. <1 = 50°

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