Q34 of 158 Page 159

The measures of ∠x and ∠y in Fig. 6.14 are respectively

Exterior angle is sum of interior opposite angles


∴ 120° = x + 50°


x = 120° - 50° = 70°


Angle sum property


Sum of all angles of triangle is 180°


50° + x + y = 180°


50° + 70° + y = 180°


120° + y = 180°


y = 180° - 120° = 60°

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