The straightedge can only be used to draw a straight line, or check to see if a surface is flat, but cannot measure length. A ruler can be used to draw a straight line or check for flatness, and a ruler can also measure length because it has evenly spaced markes denoting inches and centimeters.
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A protactor ,ruler, and a straightedge
A straight edge looks like a ruler.
straightedge (not a ruler, can't have markings) and compass. all of geo only these 2
false apex The Greeks used a straightedge and a compass
True