tolong kerjkan no 16 pake kalo sudah jawab terima kasih

BC*2 = 20*2 + 21*2
BC*2 = 400 + 441
BC*2 = 841
BC = √841
BC = 29 cm

Keliling = AE + EB + BC + CD + DA
= 20 + 21 + 29 + 20 + 20
= 110 cm
Jawaban = a. 110 cm