1a.) ??
1b.) SA = (2.24*1.5)*4+(3^2)
2.) (6*12)+(3.6*4)2
6*12 because the length of the sides of the three inner rectangles are equal to 6 and 4*3, which is 12.
3.6*4*2 because if you cut the triangles and shape them into rectangles, you get side lengths of 3.6 and 4, and then you multiply by 2, to account for the other triangle.
3a/b.)??