Arbitrary Triangle Calculator
The shape of a closed figure (including its internal area) composed of three non collinear points on a plane and the line segments connecting each two points is called a triangle. Each line segment that makes up a triangle is called an edge of the triangle. The common endpoints of adjacent sides are called the vertices of a triangle. The angle between adjacent sides is called the interior angle of a triangle, abbreviated as the angle of a triangle. The angle between the extension of one side of a triangle and its adjacent side is called the outer angle of the triangle. The triangle with vertices A, B, and C is denoted as △ ABC and pronounced as triangle ABC.
The shape formed by three straight lines on a plane or three curved lines on a sphere is called a plane triangle; The shape formed by three arcs is called a spherical triangle, also known as a triangle. △ABC..