![[Wordless Wednesday] Trapezoid Christmas Tree](http://mathfour.com/wp-content/uploads/2011/12/MathFourXmasTreeTrapezoidFI.jpg)
Wow – a Wordless Wednesday without one word! Continue Reading →
[Wordless Wednesday] Trapezoid Christmas Tree
Category Archives: Geometry
What is a Ruler and Compass Construction?
Inspired by Oleg Gleizer’s teacher interview question, this is the definition and the start of a series on ruler-and-compass constructions. Continue Reading →
Teaching Geometry with Pickles
Another place to see geometry in action – Vlasic has segmented pickles (like cylinders) into ovals (like ellipses)! Continue Reading →
Cuisenaire Rods Go Pythagorean!
Cuisenaire Rods can be used for all sorts of things – including teaching some Pythagorean Theorem goodies using right triangles and squares! Continue Reading →
How to Teach Right Triangles when Crossing the Street
You expose yourself to more risk when you take the fast route between your car and the store. Sometimes the hypotenuse in a right triangle isn’t the best way to go! Continue Reading →
Perimeter and Area of Mommy’s Necklace
Another Count 10, Read 10 activity! This time an opportunity to talk area and perimeter using your necklace. Continue Reading →
How to Teach Similar Triangles and Have Fun Doing It
Similar triangles can be different from congruent triangles. Here’s how to play with them on a nifty toy. Continue Reading →
The Difference Between Similar and Congruent Triangles
What’s the difference between congruent and similar triangles? This post shows it – AND there’s a video on how to demonstrate and learn congruent triangles with the Discovery Toys Giant Pegboard! Continue Reading →
Learning Right Triangles with Discovery Toys
You can use a pegboard and rubber bands to experiment with right triangles. Here are some ideas. Continue Reading →