Isosceles Trapezoid

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Investigate properties of an isosceles trapezoid.

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Equal Sides

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Construct an equal-sided quadrilateral inside a trapezoid or other quadrilateral.

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Double the Fun

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Determine ways to double the dimensions of quadrilaterals.

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Optimal Quadrilaterals

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Determine the largest area of a quadrilateral for a given perimeter.

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Mystery Quadrilaterals

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Classify a quadrilateral by making measurements in a dynamic construction.

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Quadrilaterals Inscribed Inside Quadrilaterals

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Explore properties of quadrilaterals constructed using the midpoints of the sides of given quadrilaterals.

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Diagonals of Quadrilaterals

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Explore the properties of the diagonals of various quadrilaterals.

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Constructing Quadrilaterals 1

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Given two parallel lines, form various quadrilaterals.

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Quadrilateral with Squares on the Sides

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Explore the relationship of the two line segments formed by connecting the centers of the squares on the opposite sides of the quadrilateral.

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Quadrilateral with Maximum Area

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Find a quadrilateral with maximum area given a fixed angle and two fixed line segments.

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