Straightedge is a 12 letter English word. It's valid Words with friends word worth 19 points.
You can make 1097 anagrams from letters in straightedge (adeegghirstt).
First recorded in 1805-15; straight + edge
The straightedge and the compasses are the only two drawing instruments recognized in elementary geometry.
It is necessary also that the straightedge be applied frequently.
The first requisite for this is a straightedge of iron or brass, as true as possible.
In other words, the trisection of any angle, by the use of the straightedge and compasses alone, is impossible.
This, like Postulate 1, requires the use of a straightedge for drawing the physical figure.
The cutter is guided along the straightedge as shown in Fig. 1.
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