Quadrilaterals A four sided figure

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QuadrilateralsA four sided figure

• Parallelograms

Parallelogram is a quadrilateral with both pairs
of opposite sides parallel and congruent.
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Properties of Parallelograms

• Opposite sides of a parallelogram are parallel.
• Opposite sides of a parallelogram are congruent.
• Opposite angles of a parallelogram are congruent.
• Consecutive angles in a parallelogram are
  supplementary.
• A diagonal divides a parallelogram into two
  congruent triangles.
• The diagonals of a parallelogram bisect each
  other.

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Parallelograms

• AB ll
• BC ll
• AE ?
• ?AEB ?
• ? ABC ?
• ? ACD ?
• m? BAD m?___ 180?
• If CD 12 , then AB
• If AC 26, then CE
• AC 2___
• AE ½ _____

A
B
E
D
C