If by sperical triangle you mean a triangle on the surface of a sphere, you will need 3 dimensional coordinate geometry. Whether you use polar coordinates or linear coordinates will depend on what you want to "solve".
there are different ways and different things to solve in a triangle. When you want to find the following 1)area of the triangle, the formula is A=1/2 bh. 2)sides of a right triangle you can use the...
It depends on what information you have. There are different answers for when you know the base and vertical height, ortwo sides and an included angle,one side and two angles (including the angle...