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Need the answers quick​-example-1

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Answer:

43, 45, 36

Explanation:

2a

43+x+x+51=180 [Sum of angles of a triagle]

2x=180-43-51

x=86/2

x=43

2b

x+90=135 [The measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles of the triangle]

x=45

2c

x+2x=108 [The measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles of the triangle]

3x=108

x=108/3

x=36

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