Geometry

Trigonometry is one of my favorite units to teach. It is super visual which is a huge plus for my students. All the problems in this unit are easily tied to real life. And when I say real life, I m…

Use this Desmos activity to help students learn about conditional statements and the converse, inverse, and contrapositive of them.

Volume and Surface Area 7

A remote learning resource for determining if a triangle is acute, right, or obtuse via Desmos

UPDATE! Barbie went to high school and can now do inverse trig functions with her zipline engineering! Geometry students found angles of depression using inverse trig functions and Pythagorean theorem to find the length of cable they needed! The handout and more photos can be found at the end of this post! Math and Science classes could have been sponsored by Mattel this year with all the Barbie involved! You can read about our super fun Barbie Bungee adventures here or over at my awesome...

This investigation helps students find the shortcuts when solving for a part of a right triangle with an altitude to the hypotenuse. It assumes prior knowledge of the geometric mean.

How to Make a (Hexa)Hexaflexagon: So many of you have probably seen the Video by Vi Hart about Hexaflexagons. I found that her 'Tutorial' was to fast paced and I could not keep up so I made this Instructable! But what is a hexaflexagon, that is explained in the video, if you …

These hands on geometry lessons are such a great way to help kids see the relationship between the interior and exterior angles in triangles! This free download is simple to use and includes teaching tips and an answer key!

Explore similarity among Legos, Duplos, and Mega Bloks in Geometry

This post contains a Amazon Affiliate links. This does not effect you in any way. However, if you make a purchase through this link, I receive a very small commission that keeps this blog running. In Geometry, students have such a hard time visualizing the different parts of 3-dimensional shapes. My students always had a particularly hard time with pyramids. This cool trick really helps - and all you need is an envelope. How to Create a 3D Pyramid Out of an Envelope First, you need an...

Students use the Triangle Inequality Theorem which states that the sum of any two sides of a triangle must be greater than the third to find a path through the maze. Students can also challenge one another by creating their own maze and key. Also see http://systry.com/triangle-musings/