We used the Mathematics Assessment Project formative assessment lesson on Calculating Volumes of Compound Objects. MAP also has a Glasses task that includes student work. 419 more words

## Tags » Geometry

#### Cyclic Quadrilaterals

A quadrilateral whose vertices all lie on the same circle is called a *cyclic quadrilateral*. One of the most important techniques in solving geometry problems is by looking for cyclic quadrilaterals.

*More to be added…*

#### The Pizza Theorem

(A screenshot from this video about the pizza theorem.)

Let’s have an internet show of hands, who likes pizza? Or, rather, who *doesn’t* like pizza? Pizza is a favorite among many, and so it’s kind of unsurprising (in hindsight) how there exists a whole theorem about it. 436 more words

#### Hot Coffee

CCSS say the following about what students should be able to do concerning the volume of a cylinder.

8.G.C.9. Know the formulas for the volumes of cones, cylinders, and spheres and use them to solve real-world and mathematical problems. 1,523 more words

#### A rotation equals two reflections

In the picture below, the red line and the blue line are the reflection lines.

- The A’B’C’ triangle is a reflection of the ABC triangle in the red line. 424 more words

#### Reflecting on the Cambridge O'level syllabus

Today I found myself looking at my download folder and saw a transformation board game document I downloaded last fall. So I searched to see if I could find more on-line. 360 more words

#### Symmetry for Big Kids: The Dihedral Group

Continuing my studies in group theory, I decided to divulge here one of my *favorite* simple groups, the dihedral group. This group intrigues me simply because… 510 more words