Question

I will make us brain test bhi solve that question nicely

Answer 1

a+100+3a=180 (linear pair)

4a+100=180

4a=180-100=80

a=80/4=20

a=20, 3a=3*20=60

Answer 2

FROM THE FIGURE,
WE CAN UNDERSTAND THAT AB = 180°
100 + a + 3a = 180° (Linear pair)
100 + 4a = 180
4a = 180 - 100
4a = 80
a = 80/4
a = 20°
3a = 3*20 = 60°
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