Geometry - two dimensional shapes
Polygons
- Concept Development Rectangles
- Polygons
- Sum of Interior Angles: Triangle Part 1
- Sum of Interior Angles: Triangle Part 2
- Sum of Interior Angles: Polygons
- Sum of Interior Angles: Quadrilaterals
- Polygon Formulas on a Spreadsheet
- Dividing Polygons into Triangles on the Computer
Triangles
- Isosceles Right Triangle
- Isosceles Right Triangle: Practice
- Measuring Isosceles Right Triangle: Part 1
- Measuring Isosceles Right Triangle: Part 2
- 30 - 60 - 90 Triangle: Part 1
- 30 - 60 - 90 Triangle: Part 2
Circles
Squares
- Using “Sea Squares”
- “Sea Squares”: Writing Samples
- “Sea Squares”: Extending Literature
- Countdown Activity: Using “Sea Squares”
- Square Number Pattern
- Square Number Computer Spreadsheet
- Square Number Table
- Square Number Computer Graphics
- Finding Square Roots
- Square Roots on the Computer
Parabolas
Transformations and Constructions
- Exploring Tangrams
- Using “Grandfather Tang‘s Story”
- Constructing a Perpendicular Bisector
- Constructing a Six Pointed Star
- Using Geometers Sketchpad to Create Centroid
- Constructing Congruent Isoceles Triangles
- Constructing Congruent Triangles
- Using Geometers Sketchpad to Create Quadrilaterals
- Using Geometers Sketchpad to Create Triangles