Find the perimeter of a triangle
The perimeter is the length of all sides of the polygon. The perimeter is denoted by a capital Latin letter P. There are several ways to find the perimeter of a triangle, which one to use depends on the initially known data.
Find the perimeter knowing three sides
Find the perimeter of a triangle, knowing its area and the radius of the inscribed circle
Find the perimeter of a triangle, knowing the two sides and the angle between them