lesson
Sides and corners
Read with an adult. You can say, point, draw or write your answer.
1 · Learn
A flat shape is two-dimensional. Polygons have straight sides that meet at corners, called vertices. A triangle has three straight sides and three vertices.
A rectangle has four straight sides and four square corners. A square is a special rectangle with all four sides equal. Turning a shape does not change its name.
2 · Worked example
I count four equal straight sides and four square corners. The shape is a square even when it is tilted.
3 · Your turn
Does a triangle stop being a triangle when it points down? How many vertices does it still have?
Check your answer
No. It still has three straight sides and three vertices.
4 · Apply your learning
Sort drawn triangles, rectangles, squares and circles. Explain the features used, not just their colour.
Adult guidance and safety
Use practical objects before symbols. Read the task aloud when needed and ask the child to explain, not just name an answer. Revisit with different examples; one successful answer is not proof of fluency.
Open your writing and drawing pad
Write, draw or show your working. Use a mouse, pen or finger. This pad is not a submitted answer.
Not saved to your account. Download your drawing as PNG and your typed notes as TXT before leaving or refreshing. They are separate files. Do not enter private information.
Open a picture saved on this device to draw on it again. Opening replaces the drawing, but Undo can restore it. PNG only, up to 4 MB and 4096 × 4096 pixels. The picture stays in this browser; it is not uploaded. Paper lines in a saved picture become part of that picture.
Clear the drawing? Your typed notes will stay. You can undo this action.
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Open a UTF-8 TXT file from this device, up to 40 KB and 10,000 characters. It stays in this browser. Opening can be undone until you type again. Downloads keep a new copy; they do not change the file you opened.
Replace the notes on this page with the opened file? Download the current notes first if you want to keep them.
Typed notes are not submitted answers.
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