∵AD//BC,DE//AB
∴△ABED是平行四边形
∴AD = BE,AB = DE
∵C△CDE = DC+CE+DE=36cm
∴CD+AB+DE = 36cm
∴C梯形ABCD = AD+BE+CD+AB+DE=2AD+CD+AB+DE=2*6+36=48cm
∵AD//BC,DE//AB
∴△ABED是平行四边形
∴AD = BE,AB = DE
∵C△CDE = DC+CE+DE=36cm
∴CD+AB+DE = 36cm
∴C梯形ABCD = AD+BE+CD+AB+DE=2AD+CD+AB+DE=2*6+36=48cm