Same-Side Interior Angles

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I constructed the same-side interior angles supplementary. If you change the angle measurements, are the lines still parallel? If you move the lines, are the lines still parallel?

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Constructing the Copy of an Angle + Angles Activities
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Proving Triangles Congruent (2): One Step Transformations

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Mrs. Buchanan Geometry AO
Congruent Chords
Karli's Euler Line
what is cotangent using an angle
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Equilateral Triangles
Hypergeometric Distribution
Polygons
Translation
Similar Triangles