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Cards In This Set
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Theorem 5-1 Opposite Sides are Congruent
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Both pairs of opposite sides of a parallelogram are congruent.
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Theorem 5-2 Consecutive Angles are Supplementary
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Consecutive angles in a parallelogram are supplementary.
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Theorem 5-3 Opposite Angles are Congruent
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Both pairs of opposite angles of a parallelogram are congruent.
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Theorem 5-4 Diagonals Bisect
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The diagonals of a parallelogram bisect each other.
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Theorem 5-5
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If both pairs of opposite sides are parallel, then the quadrilateral is a parallelogram.
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Theorem 5-6
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If both pairs of opposite sides are congruent, then the quadrilateral is a parallelogram.
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Theorem 5-7
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If the diagonals of a quadrilateral bisect each other, then it is a parallelogram.
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Theorem 5-8
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If one pair of opposite sides of a quadrilateral are both congruent and parallel, then it is a parallelogram.
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Theorem 5-9
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If both pairs of opposite angles in a quadrilateral are congruent, then it is a parallelogram.
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Theorem 5-10
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The diagonals of a rectangle are congruent.
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Theorem 5-11
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The diagonals of a rectangle bisect each other.
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Theorem 5-12
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The diagonals of a rhombus are perpendicular.
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Theorem 5-13
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The diagonals of a rhombus bisect the angles in the rhombus.
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Theorem 5-14 Base Angles in an Isosceles Trapezoid
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Both pairs of base angles in an isosceles trapezoid are congruent.
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Theorem 5-15 Diagonals of Isosceles Trapezoids
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The diagonals of isosceles trapezoids are congruent.
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