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!
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The remaining figure is the are of polygons that bounded by three dimensional figure .
So that you can plot out the points of a straight line on graph paper.
count the boxes
For easy figures, you can cut up paper squares and see how many squares it takes to cover the figure. However, this takes work and if the figure is complicated, it's hard to figure out. So there's other tricks you learn to find the area of a figure, depending on what the figure looks like.
NO. This is the way to get the volume of a prism, not the surface area of any three-dimensional figure. To find the surface area of a three-dimensional figure, you must find the area of each of its faces and then add the side-areas together.