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The sum of the angles of a triangle is 180

Author:zacharias thomas

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Portions of a Sphere
Line Through Two Points and Slope
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Right Triangle Trig Ratios: sin, cos, tan
z`]]

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area
Geometry - Triangle Congruence
Rotational Symmetry-Kite
properties of lines and angles
I want to ride my bicycle (and leave traces in the sand)

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