Draw a square of 1 cm2-

Method 1, measure 1 cm to the right from the intersection of a vertical and horizontal straight line (a) on a square paper, and click (b) to draw a straight line (on the horizontal line of the original square) with the length of 1 cm; Then measure 1 cm from the intersection of the vertical line and the horizontal line, point (d) and draw this straight line (on the vertical line of the original square) with the length of 1 cm; Align one side of the triangle with the horizontal line and the other side with the endpoint (b) 1cm, draw a straight line of 1cm from this endpoint (b) and mark the endpoint (c); The length of connecting the top two endpoints (CD) should be 1 cm, otherwise, find out the reason and redraw.

To this end, I just went to the stationery store to observe four kinds of checkers. Each Tian Zi grid is square, and their side lengths are 1 1 cm,12cm,13cm and16cm respectively.

Measure the length of the Tian Zige you use. It is convenient to draw a square with 1 cm 2 on both sides in Tian Zi grid. Pay attention to leave a certain width on the other two vertical and horizontal lines of Tian Zige, and draw a perfect square of 1 cm 2, which is impartial.

Method 2: Draw a horizontal line with a length of 1 cm on a piece of white paper; One side of the triangle is aligned with the horizontal line, and the other side is aligned with the endpoint. Draw1cm upward; So draw1cm upward at the other end; Draw a line connecting the two ends above, the length should be 1 cm, or find out the reason and draw again.