Jawabanmu

2014-05-23T18:59:35+07:00
Ttrapesium^2=10^2-3^2
                  =100-9
                  =91
ttrapesium=akar 91

Lpermukaan=2.Lalas+Klalas.t
                  =2.1/2(8+14).akar 91+(10+10+8+14).4
                  =22akar91+168

Sorry if this answer doesnt ACCURATE