1.

Q8. In figure, if m | n then value of y is: ​

Answer» ONG>Step-by-step EXPLANATION:

X + y = 180⁰ -------> 1

here X = 3x + x = 180⁰

4x = 180⁰

x = 45⁰

substitute X = 45⁰ in 1

45⁰ + y = 180⁰

y = 180⁰ - 45⁰

y = 135⁰

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