MCQ
If two interior angles on the same side of a transversal intersecting two parallel lines are in the ratio $3: 7,$ then the measure of the larger angle is:
  • A
    $54^\circ $
  • B
    $120^\circ$
  • $126^\circ$
  • D
    $108^\circ$

Answer

Correct option: C.
$126^\circ$

 Let the angles be $3x$ and $7x.$
We know that sum of two interior angles on the same side of transversal is $180.$
$3x + 7x =180$
$\Rightarrow 10x = 180$
$\Rightarrow x = 18$
Therefore, the greater angle is $7x = 7 \times 18 = 126$

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