Jawabanmu

2014-09-11T21:04:07+07:00
L = d₁×d₂
d₂ = L÷d₁×2
L = 135cm²÷18cm×2 = 15cm
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2014-09-11T21:09:55+07:00
Rumus luas layang-layang:(diagonal1 x diagonal2):2
135cm2=18cm x a (dimisalkan diagonal 2 a):2
135cm2:18cm:2=a
135cm2/18cmx2/1=a
7,5x2=a
15=a





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