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Sagot :
Answer:
b=36
Step-by-step explanation:
by triangle exterior theorem
b+81 = 117
b=36
Answer:
B is 36 degrees, and a is 63 degrees
Step-by-step explanation:
180 - 117 = 63
a = 63 degrees
81 + 63 + b = 180
144 + b = 180
180 - 144 = b
36 degrees = b
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