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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., 110° = x° + 30°
⇒ x° = 110°− 30° = 80°

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