Yes, both methods are ways to find the area of either a square, rectangle or even a parallelogram.
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The volume of a rectangular prism is the length times the width times the height. The area of the base is length times width. Multiply that by the height. 384 cubic cm.
count the squares inside, but if you are looking for the real formulas: parallelogram= base times height , triangle =1/2 base times height trapezoid = 1/2 height times (base 1+ base 2) rectangle = length times width, square= length times width. hope this helped!
length x width, or base times height
length is base and height is width
V=Bh. Base is the B in the equation. In Surface area, for cube is is 6s² where s is side, or side length. For Rectangular prisms, it is 2lw + 2wh + 2lh. l=length, w=width, h=height. If there is a rectangular prism with a square base, do l x w or length times width and multiply it by 2. Do that for width times height and length times height. I hope this helped.