Find angle B if triangle ABC below is isosceles.

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asked Apr 21, 2017 226k views

1 Answer

Lakshman Chilukuri · Answer 1 · 2017-04-26T12:16:25+0000

The two base angles of an isoceles triangle are equal so we can conclude that

2x - 20 = x + 8

Now we just need to solve for x:

2x - 20 + 20 = x + 8 + 20

2x = x + 28

2x - x = x + 28 - x

x = 28

So, angle B = x + 8 which is 28 + 8 = 36°

Find angle B if triangle ABC below is isosceles.

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