What is the length of MN?
1 answer:
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Check the picture below, that'd be a cube, all equal sides so 6 squares really, its lateral or sides section are just the squares at front, back, left, right.
if say, one side is hmm "s" units long, the area of just one square is s*s or s², and the area of those four lateral squares will just be 4(s²), or 4s² then.
now, we know the lateral area is 9 cm², namely 9 = 4s², thus
and surely you know how much that is.
if say, one side is hmm "s" units long, the area of just one square is s*s or s², and the area of those four lateral squares will just be 4(s²), or 4s² then.
now, we know the lateral area is 9 cm², namely 9 = 4s², thus
and surely you know how much that is.