I am going to try to explain the problem..it is hard without providing a drawing of it. I have a rectangle..the height of the rectangle is 15cm..but inside the rectangle are two triangles..the two triangles are white and the rest of the rectangle is shaded..i need to kow the area of teh shaded part. One triangle has it’s point at the bottom left of the triangle..the bottom part of it is 15cm and the side is 12cm. the other triangle’s point is at the top right corner..there is a large shaded strip in the middle of the rectangle..does this make sense? i just need to know How to figure this out.