# 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

Describing quadrilaterals in words

Matching quadrilaterals to their descriptions

*Triangles*

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

*Circles*

Describing the parts of a circle in words

*Polygons (plane shapes with straight sides)*

## 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.

Comparing angles and right angles

Parallel and perpendicular lines

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)

## Congruency

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

## Symmetry

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)

*Sample Grade 3 Geometry Worksheet*

## What is K5?

K5 Learning offers reading and math worksheets, workbooks and an online reading and math program for kids in kindergarten to grade 5. We help your children build good study habits and excel in school.