Question

Find the surface area 4cm 5cm 6cm 13cm

Answer 1

`A_\Delta=(1)/(2)\cdot6\cdot4=12\ cm^2\\\\A_([]_1)=6\cdot13=78\ cm^2\\\\A_([]_2)=5\cdot13=65\ cm^2\\\\A=2A_\Delta+A_([]_1)+2A_([]_2)\\\\A=2\cdot12+78+2\cdot65=24+78+130=232\ cm^2`