Module 8

Key ideas in Geometry

The key ideas that I would like the students to work on is being able to identify various shapes. They must know the names of the shapes and to also list the different distinctive characteristics of the shapes as well.

Van Hiele Levels and Polygon Properties

I enjoyed doing that activity. I got all three shapes correct. You definitely need to know vocabulary to get the correct shapes.

Did you enjoy this activity? Where there questions that confused you? Did the terminology make it difficult?

Knowing that different students grasp the concept and knowledge of shapes at different levels, I would have to approach geometry instruction differently than I initially thought. We need to focus on characteristics of shapes and discuss vocabulary. We need to help student move from the visualization level to the rigor level.

I would rate myself a level two overall. I think I am very well with properties of shapes and comparing shapes. It has been a while since I have dealt with various shapes and needing to provide proof using appropriate definitions.

How do you feel about geometry? Did you struggle in high school?

Thinking about Triangles

Tricycle

Triathlon

Trident

Trio

This really made me think. Did you find this difficult?

Is it possible to make a three-sided polygon that is not a triangle?

No. Any shape with three sides, no matter the length is a triangle.

Is it possible for a triangle to have two right angles?

No, you can only have one right angle in a three sided shape to have each side connect.

How many different right triangles can be made on the geoboard?

I made 12 different right triangles. I’m unsure where the other two are.

Did you get 14? What strategy did you use to get your right triangles?

How many different types of triangles can you find? I made 5 triangles.

Equilateral, scalene, acute, obtuse, and isosceles.

Where you able to find these? Which wasa most challenging? Did you repeat any shapes by accident?