Room 20 had to make Rectangular prisms
We had to measure length x width x Depth
If I covered my Rectangular prism in gold paper
How many cm2 would I need?
Working out.
The top, bottom, the left side and the right side all equal
4 x 6=24 so 24 x 4=96
Then the 2 ends
4 x 4= 16 so 16 x 2=32
Then
96 + 32= 128cm2
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