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Supplementary Angles

Two angles that add to 180 degrees.

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Supplementary Angles
Teacher Contributed

RWA Supplementary Angles


Marine Navigation


  • Supplementary angles

Student Exploration

What if you were stranded at sea? Or on a desert island? How would you use angles to determine your position.

Learn More:

Early navigational tools. Read more at ... http://www.sea-thieves.com/education_pages/seathieves_edu_navigation.htm

Extension Investigation

Learning Direction & Degrees of Movement - http://wupcenter.mtu.edu/education/Teaching_Math/2011/lessons/Adamcik_Jeff_lp1.pdf

Bearings Bearings is a great site for estimating angles. You may choose to work with angles in 90 degree increments, or from 0 to 360 degrees. You may also use a protractor on this site if you choose. There is also a PDF/DOC with real world examples of navigation. - http://www.ngfl-cymru.org.uk/vtc/ngfl/maths/echalk/bearings/

Layering (optional)

Complementary and Supplementary Angle Pairs Practice - http://www.xpmath.com/forums/arcade.php?do=play&gameid=103

Complementary and Supplementary Angles

Make a presentation about Supplementary angles – http://www.slideshare.net/keggert/angles-in-buildings


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