To make a card or textbook cover seal to break, you need a paper rectangle specified sizes.
Make a rectangle quite easily using square.
You will need
- - paper
- - gon
- - pencil
- - scissors
To make rectangle of paper, it is first necessary to draw. Draw paper segment ab, equal to the one side rectanglea.
Attach one side of the square to the segment ab so that the angle of the polygon coincides with the end of the segment, and, noting the desired length, draw a second side rectangleand disposed at right angles to the side ab.
Attach the square to the other side of the segment ab so that the angle of the polygon coincide with each end of the segment, and draw a third party rectangleand disposed at right angles to the side ab and equal drawn by the second side. To check the correctness of the construction rectangleand again measure the second and third drawn by hand - they should be similar in length.
Draw the missing fourth side rectangleand by simply connecting the free ends of the last two built sides. Now built rectangle It can be cut with scissors.