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Triangles — Maths STD 9 — Question

Gujarat BoardEnglish MediumSTD 9MathsTriangles1 Mark
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Answer

  1. 130º
    Solution:
    $\triangle\text{ABC}$ is an iscosceles triangle and hence in the triangle other two angles are 50 and 50.
    Therefore,
    X = 180 - 50= 130º

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