INVESTIGATION 1
- Estimating rotations and angle measures
- Measuring angles with angle rulers and protractors
- Drawing shapes with given conditions
INVESTIGATION 2
- Discovering formulas for finding angle sums of polygons
- Understanding why certain shapes tessellate
- Creating tessellations
INVESTIGATION 3
- Discovering properties of triangles
- Designing triangles and quadrilaterals with given conditions
- Angle relationships
Enjoy the pics!
These students are attempting to find angle sums of triangles and quadrilaterals by tracing the shapes onto a piece of paper and the cutting off the angles to see if, when put together, they form either a straight line (180 degrees) or a full circle rotation (360 degrees).
Students used a variety of strategies to find the various angle sums. In both models shown here, students used the angle sum of a triangle to find the angle sums of other polygons.
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