apa jawaban nomor ini

Mencari CB
CB = (√DC^2 - AB^2) + 50
CB = (√50^2 - 48^2) + 50
CB = √196 + 50
CB = 14 + 50
CB = 64

Keliling :
= AD + DC + CB + AB
= 50 + 50 + 48 + 64
= 212 cm