March 30, 2009

The curriculum resources contained in this folder represent a selection of high-quality materials from the Curriki repository for grades 3-5/ages 8-10yr in Mathematics.

- Mathematics > General

- Grade 3
- Grade 4
- Grade 5

Identify and describe convex, concave, regular, and irregular polygons.

Determine the measures of interior and exterior angles of polygons, justifying the method used.

Use properties of congruent and similar polygons to solve mathematical or real-world problems.

Apply transformations (translations, reflections, rotations, dilations, and scale factors) to polygons to determine congruence, similarity, and symmetry. Know that images formed by translations, reflections, and rotations are congruent to the original shape. Create and verify tessellations of the plane using polygons.

Explain the derivation and apply formulas for perimeter and area of polygons (triangles, quadrilaterals, pentagons, etc.).

Use coordinate geometry to prove properties of congruent, regular and similar polygons, and to perform transformations in the plane.

Determine how changes in dimensions affect the perimeter and area of common geometric figures.