http://mail.wecdsb.on.ca/~david_petro/WebSketches/ProtractorAngles/index.html
This site is great for practising lining up a protractor with the base line, as well as measuring angles. Try it out!!
It starts out with acute angles only, when you are ready, click on the bottom right corner to move to angles less than 180 degrees.
https://student.desmos.com/?prepopulateCode=zp97h
Classifying angles practise. Use class code ZP97H.
Gr. 7 instructional videos:
Constructing parallel lines using a compass, pencil and ruler:
http://www.mathopenref.com/constparallel.html
Constructing perpendicular lines using a compass, pencil and ruler:
http://www.mathopenref.com/constperplinepoint.html
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