3rd Grade Math Worksheets: Geometry

Grade 3 geometry worksheets from K5 Learning

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


Quadrilaterals (shapes with 4 straight sides)

Matching quadrilaterals to their names

Identifying quadrilaterals

Describing quadrilaterals in words

Matching quadrilaterals to their descriptions

Identifying parallelograms



Classifying triangles by their angles (acute / obtuse / right)

Classifying triangles by their sides (scalene / isosceles / equilateral)

Classifying triangles by their angles and sides

Classifying triangles as equilateral, isosceles, scalene or right


Parts of a circle

Labeling parts of a circle

Describing the parts of a circle in words

Polygons (plane shapes with straight sides)

Properties of polygons

Regular polygons

Identifying polygons

Completing a polygon

Lines and angles

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

Lines, segments and rays

Comparing angles and right angles

Identifying right angles

Parallel and perpendicular lines

Classifying angles

Drawing angles with a protractor

Measuring angles #1     Measuring angles #2

Measuring and classifying angles #1    Measuring and classifying angles #2

Lines, segments, rays and angles

Area and perimeter of 2D Shapes

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 number of smaller shapes.  The exercises without a grid are a natural extension of this concept.

Area of a rectangle using a grid

Area of irregular rectangular shapes using a grid

Drawing rectangles of a given area using a grid

Area of rectangles (no grid) #1    Area of rectangles (no grid) #2

Perimeter of rectangular shapes using grid

Perimeters of irregular shapes

Perimeters of irregular shapes (missing sides)

Perimeters of rectangles (no grid) #1   Perimeters of rectangles (no grid) #2

Area and Perimeters of rectangles (no grid)


Congruent figures have identical size and shape, though their orientation can be different.  These congruency worksheets give students practice in identifying congruent shapes.

Identifying congruent shapes

Matching congruent shapes


These grade 3 symmetry worksheets give students practice in finding lines of symmetry and drawing symmetrical shapes.

Drawing lines of symmetry (all shapes symmetrical)

Finding lines of symmetry (some shapes symmetrical)

Completing symmetrical shapes (geometrical shapes)

Drawing a symmetrical rocket

Drawing a symmetrical bug



Grade 3 Geometry Worksheet Example

Sample Grade 3 Geometry Worksheet

More geometry worksheets

Browse all of our geometry worksheets, from the basic shapes through areas and perimeters, angles, grids and 3D shapes.

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