### Triangle

Triangle Welcome visitors.. In this post, we will explain about triangle. The following is the definition of a triangle. One of the basic shapes in geometry is a polygon with three ends and three vertices. The formula for the perimeter of a triangle Given a triangle with sides $a$, $b$, and $c$. Then the perimeter of the triangle is $k=a+b+c$. Types of triangles * Any triangle * Right triangle * Isosceles triangle * equilateral triangle Any Triangle is a triangle whose three sides are different lengths. Right Triangle is a triangle in which one angle is a right angle ($\displaystyle \frac{1}{2} \pi$ radians). Isosceles Triangle is a triangle with two sides the same length. equilateral Triangle is a triangle whose all sides are the same length. The formula for the area of a triangle $$L=\sqrt{s(s-a)(s-b)(s-c)}$$ or $$L=\frac{1}{2}ab.\text{sin }C$$ or $$L=\frac{1}{2}ac.\text{sin }B$$ or $$L=\frac{1}{2}bc.\text{sin }A$$ Where: $L$: area of triangle.