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Triangles — MATHS STD 7 — Question

Gujarat BoardEnglish MediumSTD 7MATHSTriangles2 Marks
Question
In Figure. find the value of $x.$
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Answer

We know that, the sum of all three angles in a triangle is equal to $180^\circ .$
So, $x + 55^\circ + 90^\circ = 180^\circ $
$\Rightarrow x + 145^\circ = 180^\circ $
$\Rightarrow x = 180^\circ - 145^\circ $
$\Rightarrow x = 35^\circ $

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