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Question

If the angles of a triangle are 30°, 30° and 120°, then the triangle is ___.


A

an acute angled triangle

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B

an obtuse angled triangle

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C

a right angled triangle

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D

a equilateral triangle

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Solution

The correct option is B

an obtuse angled triangle


A triangle with one obtuse angle is called an obtuse angled triangle.

Here, one angle is 120° which is an obtuse angle (more than 90° and less than 180°).

Hence, the triangle is an obtuse angled triangle.


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