Properties of quadrilaterals

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10 Terms

1
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Trapezoid defining feature

At least one pair of opposite sides are parallel.

2
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Trapezoid proofs

  1. At least one pair of opposite sides are parallel

  2. Is a parallelogram, rhombus or a rectangle.

3
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Parallelogram defining feature

Opposites sides are parallel

4
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Parallelogram proofs

  1. Both pairs of opposite sides are congruent or parallel

  2. Both pairs of opposite angles are congruent

  3. One pair of opposite sides are parallel and congruent

  4. Diagonals Bisect each other

  5. Is a rhombus or rectangle.

5
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Rhombus defining feature.

Four congruent sides

6
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Rhombus proofs

  1. All four angles are right/ congruent

  2. Is a parallelogram and diagonals are perpendicular

  3. Diagonals bisect the vertex angles.

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Rectangle defining feature

Four right or congruent angles

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Rectangle proofs

  1. All 4 angles are right/ congruent

  2. Is a parallelogram and diagonals are congruent.

9
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Square defining feature

Four congruent sides and 4 right or congruent angles.

10
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Square proofs

  1. All four angles are 90 degrees or congruent

  2. Is a rhombus and a rectangle.