Question

Q1. In the two figures given below, find a, b, c in each.
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Answer 1

In triangle ADC, by angle sum ppty,

60+70+c=180

= c=50°

b+c=180° (linear pair)

= b+50=180

= b=130°

In triangle ABD, by angle sum,

a+b+30=180

=a+130+30=180

=a+160=180

=a=20°

Answer 2

Answer:

a = 20°

b = 140°

c = 50°

Step-by-step explanation:

60 +70 + c = 180

130 +c = 180

c = 180 - 130 = 50°

b + c = 180

b = 180 - 50 = 130°

a + b + 30 = 180

a = 180 - 160 = 20°