Grade 3 • Mathematics • Geometry

Grade 3 Mathematics

Geometry

Geometry Vocabulary

• Congruent: shapes that have the same size and shape
• Parallelogram: a quadrilateral with two pairs of parallel sides and two pairs of equal sides
• Polygon: a closed, 2-D figure with straight lines
• Quadrilateral: a polygon with four sides
• Rectangle: a 2-D figure with 4 sides and 4 right angles, opposite sides are parallel
• Rhombus: a 2-D figure with 4 equal sides and 4 angles (not necessarily equal), opposite sides are parallel
• Square: a 2-D figure with 4 equal sides and 4 right angles
• Trapezoid: a 2-D figure that has 4 sides and 4 angles, one pair of sides is parallel
• Right angle: an angle that forms a square corner

Geometry Activities 

• Use grid paper to create congruent shapes.
• Identify, describe, and classify different household objects as solid figures.
• Use tangrams to make plane figures.
• Cut pieces of yarn to make line segments. Measure each segment in inches (to the nearest quarter inch) and centimeters.
• Go stargazing and make imaginary line segments by connecting the stars (points). Create geometric shapes.
• Go on a shape hunt! Look for geometric shapes in your home and community. Create a chart to show your findings.

Geometry Independent Practice

• Attributes and Categories of Shapes Links to an external site.
• Partitioning Shapes Links to an external site.