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d1 : d2 = 9 : 4
Dit : d2?
Jawab:
L = d1 . d2 . 1/2
162 = d1 . d2 . 1/2
324 = d1 . d2
mencari panjang d2
d1/d2 = 9/4
coba kali sama 3
9/4 = 27/12
jadi diagonal terpendek adalah 12 cm
162 = 1/2*9x*4x
162 = 18x(pangkat2)
162/18 = x(pangkat2)
9 = x(pangkat2)
√9 = x
x= 3
d1=9x= 9*3=27cm
d2=4x= 4*3=12cm
Jadi yg paling pendek 12cm