Category: Geometry

Geometry Perimeter and Volume

What is going on in these volume calculations?

Post author By mpershan
Post date October 12, 2015
6 Comments on What is going on in these volume calculations?

I’m stumped. Ideas?

Always, sometimes or never true: “A parallelogram is a rhombus.”

Post author By mpershan
Post date April 4, 2013
4 Comments on Always, sometimes or never true: “A parallelogram is a rhombus.”

What’s the next step for this student? How would you help?

Thanks to Tina C for the submission.

Geometry

“A square is never a rectangle.”

Post author By mpershan
Post date March 28, 2013
7 Comments on “A square is never a rectangle.”

The question below asked kids to state whether the given sentence is always, sometimes or never true. Then, they were asked to justify their response.

Suppose someone said this to you. How would you respond?

Many thanks to Tina for the submission!

Geometry Graphing

Plotting Points

Thanks to Andy Zsiga for the submissions. He’s wondering whether anyone has perspective on why students would graph several points correctly, and then mess up the point that contains a zero as one of its coordinates.

Anyone have a theory?