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Lines and Angles — MATHS STD 9 — Question

Rajasthan BoardEnglish MediumSTD 9MATHSLines and Angles1 Mark
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Answer

  1. 180º
    Solution:
    $\angle1=\angle5$ (Corresponding angle)
    $\angle7=\angle5$ (Vertically Opposite angle)
    $\angle4+\angle1=180^\circ$ (Linear Pair)
    $\angle4+\angle7=180^\circ$ (From above equations).

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