Question

Define triangle on the basis of its sides and angle

Answer 1

A triangle is a three-sided closed polygon made up of three straight lines joined together and the sum of their interior angles is 180° irrespective of how the three straight lines are joined.

Answer 2

HOLA

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A triangle is a geometric figure with three sides were we observe two sides are equal and parallel to each other and the other side is not equal to the other side in a triangle moreover a triangle must be having the sum of angle 180 were all the angle are equal to each other

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Simplified explanation

Now in the given figure u observe the two sides are equal and are opposite to each other and now u observe the other side which is not equal to other side

Angles

Now we have three vertices which are showed to be angle determiners

Now , Angle -- A + B + C = 180

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How to judge it is a triangle or not

To know this let's solve a question

➡ Let the angle in a figure be 25 , 25 , 25 check it's a triangle or not

Answer -- Now we have three angle

Adding we get

25 + 25 + 25 = 75

The sum of a triangle is 180 hence it is not a triangle.


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