. In fig , if AB || CD, CD || EF and y:z=3:7, find x.
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Step-by-step explanation:
Let y and z be 3u and 7u
∠x=∠z (Alternate angles)
∠x+∠y=180
∘
(Angles made on same side of transversal)
Put x=z
∠z+∠y=180
∘
7u+3u=180
∘
10u=180
∘
u=
10
180
∘
=18
∘
z=7×18
∘
=126
∘
x=z=126
∘
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