what is traingle? Share with your friends Share 0 Lalit Mehra answered this Hi! Here is the answer to your query. A triangle is a polygon with three vertices and three sides.The sum of three angles of the triangle is 180⁰. Cheers! -1 View Full Answer Gauravraj answered this a triangle is made up of are 3 lines whose sum is equal to 180. 0 ramiportugal... answered this Triangle is a fixed 3 line segments which enclose it's sides. It's measure of 3 angles are 180 degree 0