A protractor is a necessary too for Harold Jacob’s Geometry. You will need a real protractor for your Geometry homework and one comes with our Geometry Bundle, but you can find one at any school supply store too.

Use this online tool to help you become familiar with protractor use or increase your skill. Its fun too!

Trouble measuring angles? Use this online protractor to help!

Note that the “teacher controls” on this website opens up more options so that you can create, and measure, all kinds of angles!