Question

Help me to do exercise no 5​

Answer 1

(a) 70= x+20 (vertical angles are equal)

70 - 20=x

50=x

(b) x +20 = 2x -50 (vertical angles are equal)

20 + 50 = 2x - x

70 = x

(c) 140 +3x -10=180 (angles on the straight line)

130 +3x = 180

3x = 180 - 130

3x = 50

x= 50/3

Answer 2

Explanation:

a) x + 20 = 70 Vertically opposite angles are congruent

b) 2x - 50 = x + 20 Vertically opposite angles are congruent

c) 3x - 10 + 140 = 180 Linear pair