Question

∆A and ∆B are supplement of each other if m ∆B =(×+20) °, then find m ∆A.
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Answer 1

Answer:

80

Step-by-step explanation:

x+20+x=180

2x=180-20= 160

x=160/2= 80

therefore triangle B= 80+20 = 100

TRIANGLE A = 80