The rules of geometry, expressed in words and formulas, are often difficult to understand. If we translate them into the realm of the material, make them visible, schoolchildren will quickly figure out any theorems and axioms. Layouts of geometric shapes made from paper can help with this.
It is necessary
- - paper;
- - ruler;
- - pencil;
- - scissors;
- - glue.
Instructions
Step 1
To make a rectangular parallelepiped out of paper, you first need to remember what it is. This shape has six faces, and each face is a rectangle. Consequently, the unfolded parallelepiped will consist of six rectangles lying in the same plane and connected to each other.
Step 2
Decide on the desired size of the figure. Write down the values for its three dimensions - length, width, and height.
Step 3
Select paper for bonding the visuals. A very thin one will not work - it will warp too much from the glue and quickly fray. Cardboard may be too dense - it will not bend well or crack at the folds. Watercolor paper is optimal.
Step 4
Draw a horizontal line on the paper. Its length is equal to the sum of the length and width, multiplied by two. From both ends of the line, perpendicularly downward, set aside segments equal to the height of the rectangular parallelepiped. Draw a line between these segments equal and parallel to the first horizontal line.
Step 5
From the upper right corner of the resulting rectangle, set aside along the side face the number of centimeters equal to the width of the figure, and then a segment equal to the length of the parallelepiped. After that, width and length again. Draw perpendicular lines from these points (down to the opposite side).
Step 6
From the upper left corner of the common rectangle, set aside the width of the rectangular parallelepiped, from the end of this segment perpendicular to the right - the length, and then perpendicular to the bottom - again the width. Draw the same shape on the opposite side of the rectangle, starting from its lower left vertex.
Step 7
To make gluing the figure easier, valves can be provided in the drawing. Draw a narrow rectangle 1, 5 cm wide to the extreme side edge, cut its upper sides at an angle of 45 degrees. Attach three of the same valves to the parts, the construction of which was described in paragraph 6.
Step 8
Cut out the workpiece and bend it along all the drawn lines so that the side faces touch, and the upper and lower parts become the "bottom" and "cover" of the parallelepiped. Cover the valves with glue and tuck inward. After the glue is dry, the art model can be used.
