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Parallelogram. Definition A quadrilateral with two pairs of parallel sides. Trapezoid. Definition A quadrilateral with exactly one pair of parallel sides. Rectangle. Definition A parallelogram with four right angles. An equiangular quadrilateral. Rhombus. Definition
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Parallelogram Definition A quadrilateral with two pairs of parallel sides
Trapezoid Definition A quadrilateral with exactly one pair of parallel sides.
Rectangle Definition A parallelogram with four right angles. An equiangular quadrilateral
Rhombus Definition A quadrilateral with four congruent sides. An equilateral quadrilateral
Square Definition A quadrilateral with four congruent sides and four right angles. A regular quadrilateral.
Kite Definition A quadrilateral with two pairs of consecutive sides congruent and no opposite sides congruent.
Median of a Triangle A segment that has its endpoints on a vertex of the triangle and the midpoint of the opposite side
Altitude of a Triangle Note: An altitude can be inside or outside the triangle. It can also be one of the sides of the triangle. The perpendicular segment from a vertex of the triangle to the line containing the opposite side.
Angle Bisector in a Triangle a segment from a vertex to the opposite side that separates the angle into two congruent angles