Question

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Ans.11= x=16°
Ans.12= x=10°
Ans.13= y=70°, x=110°, z=110°​

Answer 1

Answer:

11. 3x + 7x + 20° = 180° (Linear Pair)

10x = 160°

x = 16°.

12. 5x + 20° = 3x + 40° (Vertically Opposite Angles)

2x = 20°

x = 10°.

13. y = 70°. (Vertically Opposite Angles)

70° + z = 180° (Linear Pair)

z = 110°.

x = 110°. (Vertically Opposite Angles)

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

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