the area of any triangle
This rule works when we are given information about the base and perpendicular height of a triangle. But what if we are given different information? Have a look at this video:
So, in general we can say that to find the area of a triangle given the sides and the angle between them, we can use:
A = ½ absinC or A = ½ acsinB or A = ½ bcsinA
A = ½ absinC or A = ½ acsinB or A = ½ bcsinA