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Triangles — MATHS STD 7 — Question

ICSE BoardEnglish MediumSTD 7MATHSTriangles2 Marks
Question
Find the unknown marked angles in the given figure:
Image
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Answer

We know that in a triangle if one side of it is produced, then
Exterior angle = sum of its interior opposite angles.
In fig., 135° = a° + 73°
⇒ a° = 135°− 73° = 62°

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