Question

kindly help me in this question

Answer 1

Here is your answer

Hope this helps you

Answer 2

$< abd \: + < adb = 180 \: degree \\ ( \: by \: exterior \: angle \: sum \: of \: propety) \\ < abd + 70 = 180 \\ < abd = 180 - 70 \\ < abd = 30 \: degree \: \\ \\ < c + < abc + < abd + < d = 180 \: degree \\ 3 < abc \: + < abc + 30 + 70 = 180 \\ 4 < abc + 100 = 180 \\ 4 < abc \: = 180 - 70 \\ 4 < abc = 80 \\ < abc = \frac{80}{4 } = 20$