Answer:
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Step-by-step explanation:
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A = 37 degrees ; B = 82 degrees
the angle A plus 143 must measure 180 degrees
angle A = 180 - 143 = 37 degrees
the sum of the inner angles of a triangle is 180 degrees
A + B + C = 180
37 + B + 61 = 180
B = 180 - 98 = 82 degrees
17/20 < 88%
17/20 = .85
.85 < .88
