To make a postcard or to seal the torn cover of the textbook, you need a paper rectangle of the specified sizes.
It is quite easy to make such a rectangle using a square.
You will need
- - paper
- - square
- - pencil
- - scissors
In order to make rectangle Of paper, it must first be drawn. Draw on the paper a segment ab equal to one side rectanglea.
Attach the square to one side of ab, so that the corner of the square coincides with the end of the segment, and, marking the desired length, draw the second side rectangleA, located at a right angle to the side ab.
Attach the square to the other side of the segment ab so that the corner of the square coincides with the other end of the segment, and draw a third side rectangleA, located at a right angle to the side ab and equal to the second drawn side. To verify the correctness of the construction rectangleAnd, once again measure the second and third outlined sides - they should be the same in length.
Build the missing fourth party rectangleA, simply by combining the free ends of the two last constructed sides. Now built rectangle Can be cut with scissors.