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4. Angles, Lines and Triangles
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Q14 of 153 Page 129

In the given figure, AB||CD. Find the values of x, y and z.

x=105, y=75, z=50


Given AB||CD


Therefore,


⇒ ∠AEF = ∠EFG = 75°[Alternate angles]


⇒ y = 75°


For CD straight line,


⇒ x + y = 180°


⇒ x + 75° = 180°


⇒ x = 105°


Again,


⇒ ∠EGF + 125° = 180°


⇒ ∠EGF = 155°


In triangle EFG,


⇒ y + z + ∠EGF = 180°


⇒ 75°+ z + 155°= 180°


⇒ z + 130°= 180°


⇒ z = 50°


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Questions · 153
4. Angles, Lines and Triangles
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