sum of interior angles of a quadrilateral is 360 degrees

Persoa autora:Mathguru

On the screen, we see a quadrilateral ABCD in blue color. Observe how the shape and angles of this quadrilateral ABCD change as we move the points A, B, C and D.

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Segment Addition Postulate (Mild Questions)
Midpoint Theorem Questions: Mild
Linear Combination of Vectors
Writing and Graphing Proportional Relationships (k>0)
Rovnoběžnost rovin

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Triangle Congruence Explorations (applet only)
Graphing the inverse of an exponential function
constructions
Geometric Constructions

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Funcións
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Triángulo equilátero
Construcións
Xeometría