A rectangular prism, mathematically speaking, is a simple geometric solid with eight right angles and six surfaces. A perfectly regular rectangular prism is a cuboid; a box that is shipped often is in the shape of a rectangular prism. For educational purposes, making a prism from a set of dimensions is a common exercise.

- Skill level:
- Easy

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### Things you need

- Piece of cardboard or construction paper of at least 8 inches by 8 inches.
- Pair of scissors or an X-acto knife
- Tape
- Pencil
- Straight edge

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## Instructions

- 1
Measure a 2-by-2-inch square, and draw it on your construction paper. This will be the front face of your rectangular prism.

- 2
Measure a 2-by-3-inch rectangle, and draw it so that one of the 2-inch sides is congruent -- shares a line with -- the 2-by-2-inch square you drew in step one.

- 3
Measure a 3-by-2-inch rectangle, to the right of the rectangle you drew in step two, and draw it so that one of the 3-inch sides is congruent with the 3-inch-long side of the rectangle drawn in step two.

- 4
Measure a 3-by-2-inch rectangle to the right of the rectangle you drew in step three, and drawn so one of its 3" sides is congruent with the 3" side of the rectangle drawn in step 3.

- 5
Measure a 3-by-2-inch rectangle to the right of the rectangle you drew in step four, and drawn so one of its 3-inch sides is congruent with the 3-inch side of the rectangle drawn in step 4.

- 6
Measure a 2-by-2-inch square, and draw it so that it is congruent to opposite 2-inch edge of the 3-by-2-inch rectangle you drew in step two. You will now have a continuous shape that looks something like a "T" with a very wide down stroke, made up the six faces or your prism.

- 7
Cut along the outer edge of the shape you just made until you have separated the piece from the excess construction material.

- 8
Fold the paper along each of the lines drawn earlier; the four long panels will form a "tube" and the two small panels will form the front and back surfaces to make the prism.

- 9
Apply tape at the long seam of the tube where the rectangle drawn in step six touches the outside edge of the rectangle drawn in step two.

- 10
Apply tape to the edge where the square drawn in step one meets the edge of the rectangle drawn in step four.

- 11
Apply tape to the edge where the square drawn in step six meets the square drawn in step two. You have now completed the prism.