Use this applet to show how to drop a perpendicular from a point onto a line.
Use this tool to design a pattern using geometric shapes.
Investigate how changes in the base and height of a trapezoid affect its area.
This applet shows the relationship between the area of a parallelogram and the lengths of its sides.
This applet is the Product Game: a fun, interactive game that exercises your skill with factors and multiples.
Use this tool to show how the side lengths of a rectangle affect the rectangle's area.
Use this applet to show how the placement of the third vertex of a triangle affects the classification of that triangle.
Investigating Functions with a Ferris Wheel: Distance vs. Width
A Web Sketchpad activity helps students make sense of relationships between quantities, in this case the way that the distance a car travels around a Ferris wheel covaries with its "width" or horizontal distance from the center of the Ferris wheel
Investigating Functions with a Ferris Wheel: Distance vs. Height
A Web Sketchpad activity helps students make sense of relationships between quantities, in this case the way that the distance a car travels around a Ferris wheel covaries with its height.
3-5, 6-8, 9-12
Use this activity to practice solving systems of equations. Use this tool to check students' answers.
Take timed turns
racing to the end of each fraction line by moving one or more of your markers
to sum to a given fraction value.
This applet allows for the construction and exploration of the Simson Line.
Discover and explore Euler's Line.
This activity allows you to discover what types of quadrilaterals can be
formed when the diagonals meet in various ways.
This interactive allows users to investigate three types of
quadrilaterals; ones with: perpendicular bisectors, congruent
perpendicular bisectors, and congruent bisectors.
This interactive demonstrates how to bisect an angle.
Review and explore the Pythagorean Theorem.
Provide a proof without words for the
This applet proves the Pythagorean Theorem "without words" using geometry.