Answer:
It states that Angle A = 3x B = 3x + 10 and C = 4x -30
We know that A + B + C = 180
Therefore 3x + 3x + 10 + 4x -30 = 180
10x -20 = 180
10x = 200
Therefore, x = 20
Angle C is 4x -30
= 4 * 20 -30
Angle C = 50
Answer is D
Explanation:
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