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Question

If one angle of a triangle is equal to half the sum of the other two equal angles, then the triangle is

A
Isosceles
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B
Scalene
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C
Equilateral
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D
Right-angled
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Solution

The correct option is D Right-angled
A=12(B+C)
A+B+C=12(B+A)
orB+C=90oorA=90o
1294484_378222_ans_d40cbe0215574ff382cb3359c2a17765.png

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