Question

solve the que please ​

Answer 1

Answer:

Value of 1/2z = 40

Sum of angle = 180

x + y + z = 180

Given x = 58

y = 42

58 + 42 + z = 180

z = 180 - 100

z = 80

Answer 2

angle on straight line = 180

angle Z + angle Y + angle X = 180

angle Z + 42 + 58 = 180

angle Z = 180 - 100

angle Z = 80

the value of ½ Z = ½ × 80 = 40

the answer is 40