Area (age 8+)
Measure areas by counting unit squares (square cm, square m, square in, square ft)
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1858 concepts · 9 subjects
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1 approach
Measure area with equal squares, not with the outside boundary.
Measure area with equal squares, not with the outside boundary.
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Learning resources
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Illustrative Mathematics · Practice link — not the full lesson
Finding the Area of Polygons
Before you open · source notes
Polygon areas are found by counting unit squares. This supports area by unit squares, not every formula shortcut.
Free, no sign-in. A teacher solution is on the same page, so use the student view with your child.
Before you openAsk how many unit squares cover one shaded polygon. Counting once does not prove every area formula.
Opening this link does not save learning or assess mastery.
Source, access and review notes
Public Illustrative Mathematics task page. The .html address responds HTTP 308 to this URL. An anonymous GET of this URL on 2026-11-12 returned HTTP 200 with no login or payment prompt. Where a teacher solution is present, it is on the same page as the student task; this check did not find a separate locked student view. An adult can use the student view section and should not read a solution aloud. Advertising was not observed in the fetched HTML text; that is not a browser, device, or ad-free guarantee. This is a paper or discussion task, not an automatically marked interactive game. Opening the link does not save practice or assess mastery. Diagrams on the page use missing or filename-only alt text, so they are not an accessible image equivalent. Accessibility still depends on an adult describing the picture.
Illustrative Mathematics. “Finding the Area of Polygons.” Licensed CC BY-NC-SA 4.0. External task; Gakuva does not copy, host, embed, or redistribute it.
CC BY-NC-SA 4.0 — link only
Check understanding
- Count unit squares to find the area of an L-shaped figure
- Measure the area of a book cover using square-centimetre tiles
- Compare areas of two shapes by counting their unit squares
“If your child draws a shape on squared centimetre paper, can they find its area by counting the squares — including making a sensible estimate for any partial squares?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Measurement
- Age range
- Ages 6–12
Standards