6-8, 9-12
In this lesson, students learn to use a compass and a straight edge to
construct rectangles of leg ratios 1:1; 1:√2; 1:√3; 1:2; and 1:√5. The
lesson culminates with the class constructing a full size façade of a
house using the proportions of the Ancient Maya.
9-12
Use this applet to show how to drop a perpendicular from a point onto a line.
9-12
Use this applet to show how the placement of the third vertex of a triangle affects the classification of that triangle.
9-12
Use this tool to demonstrate how to draw a perpendicular bisector.
9-12
Use this tool to explore how the Simson line of a triangle is related to the orthocenter.
3-5, 6-8, 9-12
Use this interactive tool to create dynamic drawings on isometric dot paper.
6-8, 9-12
Use this applet to investigate how changes in the scale factor influence
the ratio of perimeters and the ratio of areas between two figures.
9-12
In this lesson,
students examine and draw representations of cubes and then learn how to analyze
these representations using complex numbers. Students use what they know about
operations on complex numbers to see if a drawing is an accurate representation
of a cube. They also learn how to generate complex numbers that will produce
such representations.
6-8, 9-12
Become comfortable with using both radians and degrees.
9-12
Represent numbers in other bases and convert to and from decimal
representations, and then, learn how to play Static Nim.
