# Browse

## You are looking at 1 - 10 of 32 items for :

• Math Topic
• Reasoning/Sense Making/Proof
• Shapes
Clear All
Restricted access

## Triangles from Three Points

Using technology to solve triangle construction problems, students apply their knowledge of points of concurrency, coordinate geometry, and transformational geometry.

Restricted access

## Mathematical Explorations: Find the Distance: No Formula Necessary

This activity involves finding the distance between two points in a coordinate plane and emphasizes reasoning from repeated calculations, which is one of the mathematical practices specified by the Common Core State Standards for Mathematics.

Restricted access

## The Circle Approach to Trigonometry

A connected introduction of angle measure and the sine function entails quantitative reasoning.

Restricted access

## Developing the Area of a Trapezoid

When calculating the area of a trapezoid, students use a range of problem-solving strategies and measurement concepts.

Restricted access

## If Only Clairaut Had Dynamic Geometry Tools

Using Clairaut's historic-dynamic approach and dynamic geometry tools in middle school can develop students' conceptual understanding before they encounter formal proof in geometry.

Restricted access

## Using KenKen to Build Reasoning Skills

Through KenKen puzzles, students can explore parity, counting, subsets, and various problem-solving strategies.

Restricted access

## Folding Corners of the Habits of Mind

Students fold paper to make and test conjectures while reasoning about and discussing geometric ideas.

Restricted access

## Reinforcing Geometric Properties with Shapedoku Puzzles

Shapedoku puzzles combine logic and spatial reasoning with an understanding of basic geometric concepts.

Restricted access

## Bird Boxes Build Content Area Knowledge

Communicating reasoning and constructing models fold nicely into a geometry activity involving the building of nesting boxes.

Restricted access

## Improving Student Reasoning in Geometry

Parallel geometry tasks with four levels of complexity involve students in writing and understanding proof.