Talks and Presentations
GEOMETRY
Measuring
Angles: 6 Theorems for the Price of One!
How do we measure an angle – and what is it we're measuring?
These innocent questions arise in the early grades when we first hand out the
protractors. There are deeper issues involved, though, fostering themes that
echo through geometry, trig, and calculus.
Intersecting
Circles, Colliding Motorboats, and the ÒPowerÓ of a Point
Sometimes we find thereÕs a simple idea that connects several
apparently different relationships, and that insight can pave the way to
clearer understanding and broader applications. Today weÕll explore patterns in
intersecting circles and lines, encountering a great example of such a unifying
idea – with implications for teaching circle geometry.
Making
Trigonometry Make Sense
SOH-CAH-TOA. Unit circles. Radians. Wrapping functions.
Identities. Anyone ever get confused? Help your students sort things out and
tie it all together – geometrically.