tolong ya secepatnya di jawab

jawabanyya 24 cm srmoga bermanfaat

jawab

Segitiga siku siku
alas =  a = (y + 1) cm
t = 8 cm
Luas = 1/2 a t
at = 2 L
a = 2 L / t
a = 2(24)/(8)
a = 6
y + 1 = 6
y = 5

keliling = y + 1 + 2y + 8
K = 5 + 1 + 10 + 8
K = 24