Find perpendicular altitude for a triangle?

From any one vertex, you can draw a line that is perpendicular to the opposite base — that's the altitude to this base. Any triangle has three altitudes and three bases. You can use any one altitude-base pair to find the area of the triangle, via the formula A = (1/2)bh 

You have got to take a better picture. i can't you if i can't see what i'm trying to you with.. okay.