Question

In ∆ ABC , ∠ A = 54 degree , ∠ C = 72 degree , ∠ B = ?​

Answer 1

Answer:

B = 54 degree

Step-by-step explanation:

180degree = @A +@B +@C

180 = 54 + B + 72

180 = 126+B

180-126 = B

B = 54 degree

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Answer 2

Answer:

∠A + ∠B + ∠C = 180°  [ ANGLE SUM PROPERTY]

54° + ∠B + 72 ° = 180°

126° + ∠B = 180°

∠B = 180°- 126° = 54°

Hope this helps...