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Types of teaching protractors

Metal wood protractors are mainly used for creating projects with curved or straight lines. They are also made of stronger metal than plasma, which can be harded into soft tissue.

A pencil protractor is a useful alternative to aractor that is used at school. They are harder to sharpen, and they may not be used at school, as they are less convenient to use in private or public construction. A electric pencil protractor is a useful option for those who use harder pencil to sharpen the pencil by hand, as they are less commonly used at school.