--- title: "2-D shapes (age 6+)" description: "Identify and describe properties of 2-D shapes including the number of sides and line symmetry in a vertical line" canonical: https://lightmysky.com/learn/mathematics/2-d-shapes-age-6-mt_sBcRdUfAzV source: https://lightmysky.com/learn/mathematics/2-d-shapes-age-6-mt_sBcRdUfAzV.md retrieved: 2026-10-19 --- > **Agent view.** This is the Markdown twin of the page, for tools and assistants. > When to use this site, and the call that answers each job: https://lightmysky.com/agent-instructions.md > API description (OpenAPI 3.1): https://lightmysky.com/openapi.json · Authentication: https://lightmysky.com/auth.md > Pricing: https://lightmysky.com/pricing.md · Catalog: https://lightmysky.com/llms.txt · Full catalog: https://lightmysky.com/llms-full.txt > Every machine-readable file on this domain: https://lightmysky.com/.well-known/ai-catalog.json > Ask for Markdown with `Accept: text/markdown`, a `.md` address, or `?mode=agent`. # 2-D shapes (age 6+) Identify and describe properties of 2-D shapes including the number of sides and line symmetry in a vertical line Subject: Mathematics · Area: Geometry · Ages 6 to 7 Page: https://lightmysky.com/learn/mathematics/2-d-shapes-age-6-mt_sBcRdUfAzV ## Ready when they can - Count the number of sides of a given 2-D shape - Identify whether a 2-D shape has a vertical line of symmetry - Use properties (number of sides, symmetry) to describe and distinguish between shapes ## Lesson: Sides and symmetry of 2-D shapes A 2-D shape is flat, like a shape you draw on paper. Every 2-D shape has sides, the straight or curved edges that make its outline. To count the sides, touch each edge once and say the number. *(drawing: This is a pentagon. Count its sides: 1, 2, 3, 4, 5. It has 5 sides.)* **Example.** Priya looks at a hexagon. She touches each edge and counts: 1, 2, 3, 4, 5, 6. The hexagon has 6 sides. Some shapes have a vertical line of symmetry. Imagine a straight line going up and down through the middle of the shape. If both halves match exactly, like a mirror, the shape has a vertical line of symmetry. **Tip.** A square and a rectangle both have 4 sides and a vertical line of symmetry, but a scalene triangle, with three different side lengths, does not have one. Counting sides and checking for symmetry helps you tell shapes apart. **Recap.** Count each side once, and check if a straight up-and-down line splits the shape into two matching halves. ## Practice 18 questions on this page, each with its working shown. ## Needs first - [Defining attributes of shapes](https://lightmysky.com/learn/mathematics/defining-attributes-of-shapes-mt_bfhng6mOuy) - [2-D shapes](https://lightmysky.com/learn/mathematics/2-d-shapes-mt_KJeEeTutJI) - [Comparing 2-D and 3-D shapes](https://lightmysky.com/learn/mathematics/comparing-2-d-and-3-d-shapes-mt_yGv8doDAmp) ## Opens up - [Understanding angles](https://lightmysky.com/learn/mathematics/understanding-angles-mt_8OAGVdeTJ_) - [Sorting 2-D and 3-D shapes](https://lightmysky.com/learn/mathematics/sorting-2-d-and-3-d-shapes-mt_fEuoBYw6bU) - [Lines of symmetry in 2-D shapes](https://lightmysky.com/learn/mathematics/lines-of-symmetry-in-2-d-shapes-mt_hRZyKvz1KN) - [Drawing 2-D shapes and making 3-D shapes](https://lightmysky.com/learn/mathematics/drawing-2-d-shapes-and-making-3-d-shapes-mt_vJUa62bxeR) - [Measuring Perimeters](https://lightmysky.com/learn/mathematics/measuring-perimeters-mt_wE7-Gs9ENL) - [Classifying quadrilaterals](https://lightmysky.com/learn/mathematics/classifying-quadrilaterals-mt_Xt1cRqaBOW) - [Drawing shapes with given attributes](https://lightmysky.com/learn/mathematics/drawing-shapes-with-given-attributes-mt_zuOGOGFAKb)