Reply to "How do I tell what radius I have?"

Dave45681OGR Forum Member

PLCProf posted:
Egad...........
All you need is 1 piece of curved track and a straightedge and a ruler as shown in the photo. Radius of this piece is about 18, it is O-36.
No good - Too simple.......

Not that I am disagreeing, but you have to admit for the general trig class they don't assume the width of the line defining the circle would be wide enough to know which direction to point the ruler and straight edge to end up in the center.

Without the width of the track to guide us in how to hold the ruler roughly perpendicular at the ends of the piece of track, it would be easy to measure incorrectly with that method.

-Dave

8/6/197:34 PM

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