tolong bantuu aku nomor 34

DC^2 = 9^2 + 12^2
DC^2 = 81 + 144
DC = √ 225
DC = 15 cm

ED^2 = 17^2 - 15^2
ED^2 = 289 - 255
ED^2 = 64
ED = √64
ED = 8 cm

CB^2 = 16^2 + 12^2
CB = √ 256 + 144
CB = √ 400
CB = 20 cm

Keliling
= AE + ED + DC + CB + BA
= 17 + 8 + 15 + 20 + 20
= 80 cm

jawaban : A