Find the surface area by base x height x2 for the triangles then. 8 squared plus 10 squared equals hyp squared which would give the slope measure. so the multiply that by 8 to get the slope area and the 8 x 8 to get the back hope this helps.
You would add 5 and 17 and that would equal 22 Now it would be 22=J-14 Then add 14 on both sides so it cancels out 22 plus 14 is 36 So J would equal 36
