perhatikan gambar berikut. jika ABC dan DEF sebangun, nilai x + y=.....cm

DE² = EF² + FD²
DE² = 3² + 4²
DE² = 9 + 16
DE² = 25
DE = √25
DE = 5 cm

x / 18 = 3/4
x = 3/4 x 18
x = 13,5 cm

y/18 = 5/4
y = 5/4 x 18
y = 22,5 cm

x + y = 13,5 + 22,5
         = 36 cm

[B]