Reading a ProtractorDate: 9/8/96 at 22:29:58 From: Bob Vanselow Subject: Reading a Protractor Which side of a protractor scale do you use? Date: 9/9/96 at 11:39:23 From: Doctor Robert Subject: Re: Reading a Protractor I think that the easiest way to decide which scale to use is to look at the angle you're measuring. If it is greater than a right angle (more than ninety degrees) then use the scale that has numbers greater than 90. If the angle is obviously acute (measures less than 90 degrees), use the scale which has numbers less than 90. Of course you have to line up the protracter correctly with the center point on the vertex of the angle and one of the rays of the angle coincident with the line on the protracter. Happy measuring! -Doctor Robert, The Math Forum Check out our web site! http://mathforum.org/dr.math/ |
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