tolong ya no 14 dan 15 pliss pakai cara yaa

14) AC = CB = 2m - 8
AB = m + 4

Keliling = AC + CB + AB
88 = 2m - 8 + 2m - 8 + m + 4
88 = 5m - 12
5m = 100
m = 20

AC = 2m - 8
AC = 2(20) - 8
AC = 40 - 8
AC = 32 (E)

15) PR² = PS² + SR²
17² = PS² + 8²
289 = PS² + 64
PS² = 225
PS = 15 cm

Luas bangun = luas segitiga PSR - luas segitiga QSR
luas = (1/2 x PS x SR) - (1/2 x QS x SR)
luas = (1/2 x 15 x 8) - (1/2 x 6 x 8)
luas = 60 - 24
luas = 36 cm² (C)