Tolong yang jawab yang no 6 pake cara pliss

JPR = 12s

A)
JPR = 12(7,5)
= 90 cm

B)
D.sisi = s√2
8√2 = s√2
8 = s

Jpr = 12(8) = 96cm

C)
D.ruang = s√3
10√3 = s√3
10 = s

Jpr = 12(10) = 120 cm

D)
s = √Lalas
s = √49 = 7

Jpr = 12(7) = 84 cm