three angles,i know a little bit about triangles,a triangle is a three angle polygon,90 degrees sometimes,i know that their different types,acute angles,three sides,straight lines to make triangle,scalene triangle has no line of symmetry,right angle,equilateral triangles equal sides,i know that they have 3 angles,perimeter= sum of all sides,isosceles have one line if symmetry,obtuse angle,all triangles always equal to 180,area= 1/2 * base * height,always add up to 180,three angles,90 degree,obtuse,acute,3 sided polygon,different degrees,triangles are polygons with 3 sides,,theres obtuse and and cute angles,as much u can show us,they all have three sides and only three,right andgles,as much u can show,right angles,obtuse,obtuse angles are above 90 degrees,acute angles are blow 90 degrees,always have 3 sides,pythagorean theorem to find unname angle,it could be 90 degree,sometime triangle is 90 degrees,some have acute angles,two dimensional,some have obtuse angles,szzzssesj,