Relationship of angles and sides of a trapezoid

Author:
mkrivca
Topic:
Angles, Trapezoid
Relationships of sides and angles of a trapezoid.
GeoGebra Applet
Based on this, what can you conjecture about the relationship of ∠B and ∠D. What about the relationship of angles ∠A and ∠C. What does your conjecture about the specified angles imply about sides AB and CD.

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