Class 3 Mathematics
Geometry Class 3 Worksheet with Online Activities & Quiz
Explore 2D shapes, 3D solids, lines, angles and symmetry with a timed quiz and hands-on models.
Explore WitKnowLearn’s geometry worksheet for Class 3 with online quiz and online activities. Name flat shapes and solid shapes, count sides, corners, faces and edges, spot right angles, tell line segments from rays and lines, and find lines of symmetry. Every activity uses a diagram or model you can tap, shade, join or sort.
Geometry Online Quiz for Class 3
Name this shape.
Geometry Online Activities for Class 3
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Learning games
Maths workshops
Extra challenges
Shape Detective
Learning goal: Count corners to identify shapes, even when they are turned.
How to play: Tap every shape that has exactly 4 corners. Press Check.
Geometry for Class 3: complete topic guide
What is geometry?
Geometry is the part of mathematics that studies shapes, their parts and where they sit. In Class 3 you learn the names and properties of flat shapes (2D) and solid shapes (3D), how to describe lines and angles, and how to find lines of symmetry.
Flat (2D) shapes
A flat shape lies on paper. It has length and width but no thickness.
| Shape | Straight sides | Corners | Remember |
|---|---|---|---|
| Triangle | 3 | 3 | Tri means three. |
| Square | 4 | 4 | All sides equal and 4 right angles. |
| Rectangle | 4 | 4 | Opposite sides equal and 4 right angles. |
| Pentagon | 5 | 5 | Penta means five. |
| Hexagon | 6 | 6 | Hexa means six. |
| Circle | 0 | 0 | One curved edge and no corners. |
Solid (3D) shapes
A solid shape takes up space. A face is a surface, an edge is where two faces meet and a vertex (corner) is where edges meet.
| Solid | Flat faces | Curved surfaces | Edges | Vertices | Real object |
|---|---|---|---|---|---|
| Cube | 6 | 0 | 12 | 8 | Dice |
| Cuboid | 6 | 0 | 12 | 8 | Brick or shoebox |
| Square-based pyramid | 5 | 0 | 8 | 5 | Pyramid of Giza |
| Cylinder | 2 | 1 | 2 curved | 0 | Tin can |
| Cone | 1 | 1 | 1 curved | 1 | Party hat |
| Sphere | 0 | 1 | 0 | 0 | Football |
A drawing of a solid on paper is flat. The real object, such as a dice or a ball, is solid.
Points, lines, segments and rays
| Name | End points | Meaning |
|---|---|---|
| Point | Not applicable | An exact spot. |
| Line segment | 2 | A straight part with a start and an end. It can be measured. |
| Ray | 1 | Starts at a point and goes on for ever in one direction. |
| Line | 0 | Goes on for ever in both directions. |
Angles and right angles
An angle is formed where two lines meet. A right angle is a square corner and measures 90°. It is one quarter of a full turn: 14 × 360° = 90°. Test a corner by fitting the corner of a sheet of paper into it.
Open and closed figures
A closed figure joins up all the way round, so it has an inside and an outside. An open figure has a gap. Only closed figures with straight sides are called polygons such as triangles and squares.
Lines of symmetry
A line of symmetry cuts a shape into two halves that match exactly when folded.
| Shape | Lines of symmetry |
|---|---|
| Rectangle (not a square) | 2 |
| Square | 4 |
| Equilateral triangle | 3 |
| Circle | Many |
Cutting, joining and nets
A square cut from corner to corner gives 2 equal triangles. Each triangle is 12 of the square. A net is a flat pattern that folds into a solid. A cube net has 6 squares joined edge to edge, for example a row of 4 with one square above and one below.
Solved examples
Common mistakes
| Mistake | Correction |
|---|---|
| Calling a sphere a circle | A circle is flat. A sphere is a solid ball. |
| Saying a turned square has a new name | Turning does not change the name. |
| Counting 24 edges on a cube | Count each edge once. A cube has 12 edges. |
| Calling every four-sided shape a square | A square needs 4 equal sides. A long rectangle is not a square. |
| Saying a cone has 2 flat faces | A cone has 1 flat face and 1 curved surface. |
| Naming an open figure as a shape | Check that the boundary joins all the way round. |
Geometry in daily life
Dice are cubes, bricks are cuboids, footballs are spheres, tins are cylinders and party hats are cones. Clock hands make a right angle at 3 o’clock and 9 o’clock. Windows and doors are usually rectangles and wheels are circles.
Related Maths Worksheets
- Fun with Shapes worksheet for Class 3Build and compare shapes
- Toy Joy solids worksheet for Class 3Recognise solid shapes
- Front top and side view worksheet for Class 3Look at objects from different sides
- Fractions worksheets for Class 3Divide shapes into equal parts
- Fair Share equal parts worksheet for Class 3Folding and equal parts
- Perimeter and area worksheet for Class 3Measure around and inside shapes
- Data handling worksheet for Class 3Sort and count shapes
- Fun at Class Party shapes and measurement worksheet for Class 3Shapes in a party setting
- 2D and 3D shapes worksheets for Class 2Revise shape names and properties
- Lines and angles worksheet for Class 2Revise line directions
- Geometry worksheet for Class 4Extend shape reasoning
- Shapes Around Us worksheet for Class 4Shapes and symmetry
Frequently Asked Questions
What is geometry for Class 3?
Geometry is the study of shapes. In Class 3 it means naming flat and solid shapes, describing their sides, corners, faces and edges, and learning about lines, right angles and symmetry.
What is the difference between 2D and 3D shapes?
A 2D shape is flat, like a square drawn on paper. A 3D shape is solid and takes up space, like a dice or a ball.
How many sides and corners does a triangle have?
A triangle has 3 straight sides and 3 corners.
How is a square different from a rectangle?
Both have 4 sides and 4 right angles. A square has all 4 sides equal. A rectangle has equal opposite sides, so it is usually longer than it is wide.
How many faces edges and vertices does a cube have?
A cube has 6 faces, 12 edges and 8 vertices.
What is the difference between a face an edge and a vertex?
A face is a surface of a solid. An edge is where two faces meet. A vertex is a corner where edges meet.
Does a sphere have flat faces or corners?
No. A sphere has one curved surface, no flat faces, no edges and no corners.
What are the surfaces of a cylinder?
A cylinder has 2 flat circular faces and 1 curved surface.
What is a line segment?
A line segment is a straight part of a line with two end points. You can measure its length.
What is a right angle?
A right angle is a square corner. It measures 90° and fits the corner of a sheet of paper.
What is a line of symmetry?
It is a line that splits a shape into two halves that match exactly when folded. A rectangle has 2 and a square has 4.
Does turning a square change its name?
No. A square stays a square when it is turned. Its sides and corners do not change.
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