3-5, 6-8
To
find the area of a triangle, try to make a
parallelogram using a copy of the triangle.
9-12
Construct and explore of a circumcircle.
9-12
This interactive allows users to investigate three types of
quadrilaterals; ones with: perpendicular bisectors, congruent
perpendicular bisectors, and congruent bisectors.
9-12
Discover and explore Euler's Line.
3-5, 6-8
When the nine justices of the Supreme Court meet, they greet one another
with a handshake to show harmony of purpose, even though their views
may differ. How many handshakes occur? In general, how many handshakes
occur when there are n people?
9-12
This applet allows for the discovery of the incenter and incircle of a triangle.
6-8
Explore when an isosceles triangle obtains its maximum area.
9-12
Use this tool to investigate what happens when point P is moved to various points within, on, and outside the circle. What, if any, relationships can you identify among the segments and radius?
9-12
This applet gives a proof of completing the square "without words" using geometry.
6-8
This applet proves the Pythagorean Theorem "without words" using geometry.
