CBSE Class 7 Answered
What is an exterior angle of a triangle? Illustrate using diagram.
Asked by Topperlearning User | 17 Nov, 2013, 11:06: PM
Expert Answer
When any side of a triangle is produced, the angle so formed, outside the triangle and its vertex, is called its exterior angle.
For example, ∠ACD is an exterior angle as the side BC of 
ABC is extended.
Clearly, the exterior angle ACD and the adjacent interior angle ACB are supplementary.
i.e. ∠ACD + ∠ACB = 180o
Answered by | 18 Nov, 2013, 01:06: AM
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