Grade 3 Geometry Worksheets — Perimeter and Shapes PDF
Third grade geometry is where measuring meets shape. Grade 3 offers five separate sheets: Perimeter, Area of Rectangles, 2D Shape Properties, 3D Solids and Symmetry. Four of the five now print a picture and put the measurements on it: Perimeter and Area of Rectangles draw the shape to scale with a number against each side, 2D Shape Properties draws the polygon it is asking you to name, and Symmetry draws the shape whose folds are being counted. 3D Solids stays in words, because a solid a child cannot see is still a solid a child can be told about.
Perimeter is the usual starting point: it opens on Rectangles, moves to Triangles and other polygons, then hands over a total and asks you to Find a missing side. Pick a sheet, choose a level inside it, set how many questions you want, tick the answer key box, and print. The link in your address bar rebuilds the identical sheet whenever you need it again.
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Geometry · Grade 3
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Grade 3 · 4 pages · A4More Grade 3 geometry skills
Each one generates a different kind of question, with its own three levels and answer key.
- PerimeterAdd up every side to find the distance all the way around a shape.
- Area of RectanglesMultiply length by width to find the space a rectangle covers.
- 2D Shape PropertiesName a flat shape from its sides, corners and angles — and back again.
- 3D SolidsCount the faces, edges and corners of solid shapes, and name them.
- SymmetryCount the lines of symmetry in a drawn shape and in capital letters, then finish half a pattern across a printed mirror line.
What each level generates
Grade 3 perimeter — the exact skill behind each difficulty setting, straight from the generator.
- Level 1Rectangles
- Level 2Triangles and other polygons
- Level 3Find a missing side
Grade levels follow the progression common to most English-language curricula — not one specific national curriculum. Every level shows exactly what it generates, so you can check the fit with your own program. See the full scope & sequence →
What Grade 3 geometry usually covers
Two ideas dominate third grade: perimeter as a total distance, and the vocabulary of two-dimensional shapes. Perimeter is the friendlier of the two because it is only addition — but children still need to understand that a rectangle has four sides, not two, and that the two measurements given each describe a pair. The classic error is answering 13 cm for a 9 cm by 4 cm rectangle, having added the two numbers once and stopped.
Shape vocabulary at this age moves past "triangle, square, circle" to the family names that go with a side count — pentagon, hexagon, octagon — and to properties such as equal sides, parallel sides and right angles. A child who can say why a rhombus is not a square has understood something a child who has only memorised pictures has not. That vocabulary is what 2D Shape Properties drills, and 3D Solids asks the same kind of question about faces, edges and corners.
How to work through a sheet
For perimeter, the sketch is now printed for you: the rectangle is drawn with a number against each side, and the job is to add what is shown. Ask for the four numbers before the answer — pointing at each side in turn — and the doubling error disappears on its own.
On 2D Shape Properties, keep a short reference list of side counts visible for the first sheet, then take it away for the second. Ten questions is plenty for one sitting at this age. Area of Rectangles is the companion to Perimeter — the same shapes, a different question — and Symmetry offers a change of pace, counting lines of symmetry in shapes and in capital letters. Tick the answer key so the sheet can be marked immediately — feedback within a minute is worth far more at Grade 3 than a longer sheet marked tomorrow.
Frequently asked questions
▸What geometry should a Grade 3 student know?
Grade 3 usually covers perimeter of rectangles and squares, and naming two-dimensional shapes from their sides, corners and angles. These worksheets do both on separate sheets — Perimeter and 2D Shape Properties — alongside Area of Rectangles, 3D Solids and Symmetry. Each sheet carries its own three levels, so the level control changes how hard that skill is rather than which skill you get.
▸How do you find the perimeter of a rectangle?
Add all four sides. Because opposite sides of a rectangle are equal, you can add the length and the width and then double the total: a 9 cm by 4 cm rectangle has a perimeter of 2 × (9 + 4) = 26 cm. The Rectangles level of Perimeter drills exactly that with small, friendly measurements.
▸Do these worksheets need diagrams or a ruler?
A diagram on some of them, and the sheet prints it for you. On Perimeter and Area of Rectangles the shape is drawn to scale at the lower levels, with the measurements written on it rather than in the sentence, because reading a length off a shape is part of the skill. The top level of each of those two turns the question round — it gives the perimeter or the area in words and asks for a side back, so there is nothing to draw. 2D Shape Properties and Symmetry draw the shape at level 1 and are in words above it. No ruler is needed: every number a question uses is printed. 3D Solids is written entirely in words at every level. Everything still prints in black and white on any printer.
▸How many questions should a Grade 3 geometry sheet have?
Eight to twelve is a realistic sitting. Use the question-count stepper to size it, and press Shuffle for a brand new set at the same level tomorrow — the practice never has to repeat itself.