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Find the Unknown Marked Angles in the Given Figure: - Mathematics

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Question

Find the unknown marked angles in the given figure:

Sum
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Solution

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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Concept for Exterior Angle Property
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Chapter 15: Triangles - Exercise 15 (A)

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Selina Concise Mathematics [English] Class 7 ICSE
Chapter 15 Triangles
Exercise 15 (A) | Q 12.4
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