Jawabanmu

2014-05-08T13:23:37+07:00
Rumus Luas = d1*d2 / 2

a. 9cm*12cm / 2 = 54cm^2
b. 12cm*16cm/2 = 96cm^2
c. 8y cm*7y cm/2 = 28y^2 cm^2

2014-05-08T13:43:06+07:00
A. luas= 12 x 9 : 2 = 54 cm
B. luas= 12 x 16 : 2 = 96 cm
C. luas= 8 x 7 : 2 = 28 cm

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