Protractor
From Wikipedia, the free encyclopedia
- Protractor also refers to a forceps, extractor or pincer, used to remove foreign objects from wounds or sutures.
Image:Grad protractor.png Image:Protractor katomierz.jpg
In geometry, protractor is a circular or semicircular tool for measuring angles. The units of measurement utilized are degrees.
Some protractors are simple half-discs; these have existed since ancient times. More advanced protractors usually have one or two swinging arms, which can be used to help measure the angle. Protractors are not always perfectly accurate when measuring angles. If available, computer software that measures angles is a more accurate alternative.
[edit] External links
- Printable protractor for download
- More printable protractors
- How to use a protractor With interactive animation
- Angle definition pages with interactive applets that are also useful in a classroom setting. Math Open Reference
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es:Transportador fr:Rapporteur mk:Агломер nl:Gradenboog ja:分度器 pl:Kątomierz pt:Transferidor simple:Protractor zh:量角器
