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OpenStudy (anonymous):
Draw a triangle with vertices A, B, and C. Now extend the sides of the triangle so that you create three exterior angles. What is the sum of these three exterior angles? Why do you think these three exterior angles have this sum? Describe your findings and explain why you think this happens.
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OpenStudy (anonymous):
how so i draw this?
OpenStudy (anonymous):
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OpenStudy (anonymous):
If you "walk around" the triangle, you turn through a circle.... (algebraically each exterior is sum of opposite interiors -> 2* 180 = 360)
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