Ok I have these three points of the Cartesian plane (0,0),(2,3),(5,0)
And I have to find the area "inside these points" to me they look like a triangle
So I thought I would use 1/2 base(height)
I used the distance formula to get the base from (0,0) to (5,0) as 5
I got height from from (2,3) to (0,0) as 5
So I did (1/2)(5)(5)=12.5 only problem is that the answer in the back of my textbook says 15/2.