# What is a triangle? and give some properties of it

traingle is a closed figure bounded by the three line segment.

Some properties of Traingle are:-

• An Exterior angle+adjacent interior angle=$180\degree$
• The sum of lengths of any two sides>the length of the third side.
• The sum of angles of a traingle=$180\degree$
• An exterior angle of a traingle=sum of its two opposite interior angles

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