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Question

In a triangle ABC, A=8x,B=5x and AB = AC, then the value of x is .

A
60
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B
10
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C
40
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Solution

The correct option is B 10
Given,
A=8x,B=5x
AB = AC
In triangle ABC,
B=C=5x
[ Angles oppsite to equal sides are always equal]
A+B+C=180
8x+5x+5x=180
[Angle Sum Property]
18x=180
x=10

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