nonagon
You divide the long edge of a sheet of A4 paper by the shorter edge of the paper.
a yard of floers
A geometrical construction can be made with with a straight edge and a compass.
A construction. A construction is a geometric drawing of a figure usually made by a compass and/or a straightedge
Geometric figures can be drawn using a compass and a straight edge. This is commonly known as ruler and compass construction.
To straighten a sheet of paper, you can run the edge of your fingernail along the crease or use a ruler to smooth out any wrinkles. Alternatively, you can place the paper between two heavy books for a few hours to help flatten it out.
There are 62,370 1 millimeter squares in a sheet of A4 graph paper that measures 210 mm by 297 mm. This calculation is obtained by multiplying the length of the paper (210 mm) by the width of the paper (297 mm).
The frisbee needs to generate lift on the exterior edge of the surface (like an aircarft wing). A sheet of paper is not a frisbee, but a sheet of paper with the shape of a wing all the way around it would be.
The line that forms the edge of a figure is an edge line. Which forms the figure the has been drawn. You use this line to define a drawing or a figure.
A ruler can be classed as a straight edge.
A straight edge
The geometric term for the edge of a desk is a "line segment." In geometry, a line segment is a part of a line that is bounded by two distinct endpoints. In this case, the edge of the desk can be represented as a line segment where the two endpoints are where the edge begins and ends.