# 3rd Grade Math Worksheets: Geometry

Our grade 3 geometry worksheets review two dimensional shapes, particularly circles, triangles, quadrilaterals and polygons.  We also focus on the definition and classification of lines and angles.  The areas and perimeters of rectangular shapes are reviewed, as are the concepts of congruency and  symmetry.

## Basic properties of 2-D shapes

These grade 3 geometry worksheets review the classification and properties of 2D shapes including quadrilaterals, triangles, circles and polygons.

Identifying quadrilaterals - squares, rectangles, trapezoids, rhombuses

Parallelograms - identify quadrilaterals with 2 pairs of parallel sides

Triangles - classify triangles by sides and angles

Circles - identify and label the parts of a circle

Polygons - identifying regular and irregular polygons

Types of polygons - classifying and drawing polygons

## Lines and angles

These grade 3 worksheets review the differences between lines, segments and rays and explore ways to measure and classify angles.  A protractor is required for some worksheets.

Lines, segments and rays - identifying lines, segments and rays

Right angles - identifying right angles and comparing angles

Parallel and perpendicular lines - identify parallel and perpendicular lines

Classifying angles - classify angles as straight, right, acute or obtuse

Using a protractor -  use a protractor to draw and measure angles

Measuring angles -  measure and classify angles as right, acute or obtuse

Lines, segments, rays and angles  - identify and draw lines, segments, rays and angles

## Area and perimeters

These geometry worksheets review the concepts of area and perimeter, focusing on rectangular shapes (squares, rectangles and "L" shapes).  Exercises "using a grid" help students recognize that these shapes can be comprised of a number of smaller shapes and their area or perimeter can be determined by counting the smaller shapes.

Areas using rectangular grids - find the area of rectangles by counting squares in a grid

Area of rectangles - calculate the area of rectangles

Perimeters using a rectangular grid -  find the perimeter of rectangular shapes by using a grid

Perimeters of irregular shapes -  find the perimeters of irregular shapes

Perimeters of rectangles  -  find the rectangle's perimeter in customary or metric units

Area and perimeters of rectangles  -  calculate the area and perimeters of rectangles

## Congruency and Symmetry of 2-D shapes

These congruency worksheets give students practice in identifying congruent shapes and finding lines of symmetry.

Congruent shapes - identify shapes with the same size and shape

Lines of symmetry - identify and draw lines of symmetry

Symmetrical shapes - draw the other half of an image to form a symmetrical shape 