Grade 3

It is essential that these standards be addressed in contexts that promote problem solving, reasoning, communication, making connections, and designing and analyzing representations.
Problem Solving Links

3.3 Geometry and Measurement: Describe and analyze properties of two-dimensional shapes, including perimeters.

3.3.1 Identify right angles in two-dimensional shapes and determine if angles are greater than or less than a right angle (obtuse and acute).

3.3.2 Identify, describe, compare, analyze, and informally classify triangles by their sides and angles.

3.3.3 Identify, describe, compare, analyze, and classify quadrilaterals (square, rectangle, parallelogram, rhombus, and trapezoid) by their sides and angles.

3.3.4 Identify, describe, and compare pentagons, hexagons, and octagons by the number of sides or angles.

3.3.5 Investigate and describe the results of decomposing, combining, and transforming polygons to make other polygons.

3.3.6 Build, draw, and analyze two-dimensional shapes to understand attributes and properties of two-dimensional space.

3.3.7 Determine an appropriate unit, tool, or strategy to find the perimeter of polygons.

3.3.8 Use attributes and properties of two-dimensional shapes to solve problems including applications involving parallel and perpendicular lines, congruence, symmetry, and perimeter.

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