2D Shapes Teaching Resources
Bring dimension to 2D shapes for primary students with printable worksheets, digital activities, maths games and more — created by teachers for teachers!
This comprehensive collection of teaching resources includes editable lessons on two-dimensional shapes, aligned to the Australian curriculum and ready to be printed and used in the classroom. Explore the entire collection to find educational games, geometric activities, posters and vocabulary word wall cards to assist your students when they are learning to identify 2D figures by their names and their attributes.
Teaching this part of the maths curriculum for the first time in a while? Read on for a primer from the teachers on the Teach Starter team.
What Are 2D Shapes?
Two-dimensional shapes, or 2D shapes, are shapes that have only length and width, but no depth. Each of these geometric shapes has its own unique characteristics and properties, such as the number of sides, the types of angles and the relationship between the sides and angles.
For example, a square has four equal sides and four right angles, while a circle has no sides and no angles.
Teaching about 2D geometric shapes is crucial in those early years classrooms as these are the building blocks of more complex geometric concepts. Understanding them is an important foundation for developing spatial reasoning skills. It will also lay the groundwork for learning about symmetry, angles and perimeter and area, among other geometry and measurement concepts.
2D Shapes — A Kid-Friendly Definition
Looking to provide a simple definition for your primary students? Here's a kid-friendly definition you can use:
A 2D shape is a flat shape that has only two dimensions — length and width. When something is two-dimensional, it's flat like a drawing or a picture on a piece of paper.
Understanding 2D shapes is important because it helps us recognise and describe the shapes we see around us, and it can also help us with math and other subjects.
2D Shape Examples
A definition is a good start, but providing concrete examples will help students begin to wrap their heads around these two dimensional-objects!
Let's look at some of the common examples of 2D shapes that we teach in the early years:
Square
A square is a 2D shape with four straight sides that are all equal in length and four right angles. It is a type of rectangle and a type of parallelogram.
Rectangle
A rectangle is a 2-dimensional shape that has four straight sides. Unlike a square, a rectangle has two sides that are longer than the other two. It has four right angles and opposite sides that are parallel and equal in length.
Parallelogram
Like a rectangle and square, the parallelogram has four sides and is considered a 2D shape. The four straight sides of a parallelogram are parallel to each other. Opposite sides of a parallelogram are equal in length, and opposite angles are equal in measure. Squares, rectangles and rhombuses are all examples of parallelograms.
Trapezium
A trapezium (or trapezoid) is a quadrilateral shape with two parallel sides and two non-parallel sides. The parallel sides are called the bases of the trapezium, and the non-parallel sides are called the legs. Even though a trapezium has four sides, it is not a parallelogram!
Triangle
A triangle is a two-dimensional shape that has three straight sides and three angles. The angles of a triangle always add up to 180 degrees.
Circle
A circle is a 2D geometric shape that is round and has no straight sides. It is defined as the set of all points in a plane that are at a fixed distance (called the radius) from a single point (called the center).
Ellipse
An ellipse is a 2D shape that is similar to a circle, but its shape is stretched out or elongated. It is defined as the set of all points in a plane whose distances from two fixed points (called the foci) add up to a constant value.
Pentagon
A pentagon is a 2D shape that has five straight sides and five angles. The word 'pentagon' comes from the Greek words 'penta' (meaning 'five') and 'gonia' (meaning 'angle'). Each angle of a regular pentagon measures 108 degrees, and the sum of the angles in a pentagon is 540 degrees.
Hexagon
A hexagon is a 2D shape that has six straight sides and six angles. Each angle of a hexagon measures 120 degrees, and the sum of the angles in a hexagon is 720 degrees. Snowflakes are a common example of hexagons found in nature, and so is the honeycomb!
Rhombus
A rhombus is a 2D shape with four straight sides that are all equal in length. It is a type of parallelogram, and it has opposite angles that are equal in measure.
Octagon
An octagon is an eight-sided 2D shape. A stop sign is an octagon that students might recognise from seeing it along the road on the way to school.
Quadrilateral
A quadrilateral is a 2D shape with four sides and four angles. The sum of the interior angles of a quadrilateral is always 360 degrees. The following are all examples of quadrilaterals:
- Square
- Rectangle
- Parallelogram
- Trapezium
- Rhombus
What Are Polygons?
Many of the 2D shapes that students learn about are polygons.
A polygon is a 2D shape that has three or more straight sides and angles. Polygons can have any number of sides, but they must be straight, and they must not cross each other.
The word 'polygon' comes from the Greek words 'poly' (which means 'many') and 'gonia' (which means 'angle').
Here are some common examples of polygons:
- Triangles
- Squares
- Rectangles
- Pentagons
- Hexagons
- Octagons
A circle and an ellipse are both 2D shapes, but they are not polygons. They have a curved shape, while polygons consist of a closed structure with sides.
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Matching Lines of Symmetry Worksheets
Introduce the concept of ‘multiple lines of symmetry’ to your Grade Fours with this match-up worksheet set.
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Shape Investigation 2D Figures Task Cards
Combine fun and learning with these 2D shapes and symmetry task cards for your Grade Four students!
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Angle Word Problems – Worksheet
Download these angles word problem worksheets so your students can practise calculating missing angles.
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Batty for 2D Shapes - Halloween Shapes Worksheet
Go batty and identify the 2D shapes with a printable Halloween Shapes worksheet.
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Angles in Our Environment Teaching Slides
Explore angles in the environment using this comprehensive teaching presentation for Year 3 students.
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Classifying Triangles (By Angles) Sorting Activity
Play this sorting game when learning how to classify triangles according to their internal angles.
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Missing Angle Small Group Bingo
Practise how to find the measurement of a missing angle with this small group bingo game.
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2D Shapes Dominoes
A set of dominoes to help students consolidate their understanding of 2D shapes.
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2D Shape Character Templates
A cute 2D shape display for your classroom.
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Science Experiment - Angles of Reflection
A science experiment that explores reflected light.
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2D Shape Puppet Templates
Use these cute shape puppets when discussing 2D shape names and their properties to your students.
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Guess the Angle Board Game - The Case of the Missing Degrees
Engage your students with our 'Guess the Angle' board game that will have them estimating and measuring angles as they make their way to the finish.
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Build a City Activity
Engage your learners with this cross-curricular build a city activity that invites them to create a digital city all their own.
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Symmetry Picture Task Cards
Use these fun and colourful symmetry picture task cards to help students identify lines of symmetry in both everyday objects and 2D shapes.
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Line and Rotational Symmetry Quilt Activity
Have your students apply their knowledge of line and rotational symmetrical designs and collaborate with their peers using this fun quilt design activity!
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Measuring and Drawing Angles – Task Cards
Improve student understanding of angle measurement with this set of 24 task cards.
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Types of Triangles Interactive Game
Explore the properties of acute, right and obtuse triangles with this interactive space adventure!
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2D Shapes Poster
Use this colourful poster with a collection of 2D shapes in your maths classroom.
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Interactive Google Slides Activity - Who Am I? 2D Shapes
This interactive digital teaching resource helps students to recognise and name 2D shapes in component parts of everyday items in their environment.
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Shape Seekers PowerPoint
An interactive 162-slide PowerPoint that follows the story of a professor and their new invention that turns 2D shapes into 3D objects.
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Printable Protractor Templates
Teach your students how to measure angles using a protractor with these 180° and 360° printable protractor templates.
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Geometric Reasoning Worksheets - Year 4
2 geometric reasoning worksheets linked to the Australian Curriculum.
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Geometric Reasoning Worksheets - Year 5
4 geometric reasoning worksheets linked to the Australian Curriculum.
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2D Symmetry Poster - Reflection and Rotational
This 2D symmetry poster explores both reflection and rotational symmetry.
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Parallel and Perpendicular Lines Activity — Escape Room
Engage your students with this parallel and perpendicular lines activity that encourages cooperation and problem solving to escape!
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Parallel and Perpendicular Lines in Shapes Sorting Activity
Identify parallel and perpendicular lines in shapes in this engaging sorting activity!
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Interactive Area Puzzle (Triangles)
Have your students find the area of 16 triangles on the board and match the corresponding pieces to reveal a mystery picture.
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Sorting Symmetrical Shapes Worksheets
Use this simple but effective symmetry worksheet to reinforce the concepts of symmetrical and asymmetrical shapes with your Grade Four students.
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Symmetry Pattern Design Worksheet
Have your students create real-world symmetrical representations using this 3-page symmetry worksheet set and a tub of pattern blocks.
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Pattern Block Flowers Interactive
Use this flower-themed interactive activity for your students to practise using manipulatives to create or expand on shapes using a pattern or symmetry model.
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Identifying Lines of Symmetry Interactive Activity
Explore this rail-yard themed interactive activity with your students to teach them how to identify lines of symmetry.
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Identifying Lines of Symmetry Poster
Display this poster in your classroom as a reference tool for students to learn to identify lines of symmetry.
- 2D Shapes Worksheets
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- 2D Shapes Templates
- 2D Shapes for Preschool/Kindergarten
- 2D Shapes for Foundation Year
- 2D Shapes for Year 1
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