keliling trapesium ABCD adalah. ..cm TOLONG PAKAI CARA YA

AD=CE=CD=AE = 20cm
AB = 41cm
BE = AB - AE
= 41 - 20
= 21cm
BC^= BE^+ CE^
= 21^ +20^
= 441+400
= 841
BC= √841
= 29cm
K trapesium = 41+20+20+29 = 110cm