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Question

If two angles of a triangle are 30,120, then the triangle will be

A
Right angle triangle
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B
Scalene triangle
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C
Equilateral triangle
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D
Isosceles triangle
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Solution

The correct option is D Isosceles triangle
Let the third angle be 'x'
30+120+x=180x=180150x=30
Here, two angles are equal then it is an isosceles triangle.

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