Georgia 3.GSR.7.2
The Standard
Determine the area of rectangles (or shapes composed of rectangles) presented in relevant problems by tiling and counting.
Georgia's K-12 Mathematics Standards · Identify area as a measurable attribute of rectangles and determine the area of a rectangle presented in real-life, mathematical problems.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students tile rectangles with equal-size squares and count the squares to find area. They also split shapes made of rectangles into smaller rectangles and combine the square-unit counts.
What Mastery Looks Like
- Students cover or partition a rectangle with equal-size unit squares, then count every square once. For a shape made of rectangles, they find each section’s area and combine the counts correctly.
Common Misconceptions
- Students may count only the tiles along the edges instead of all tiles covering the surface. They may leave gaps, overlap tiles, or count shared tiles twice in a shape made of rectangles.
How to Assess It
- Give students a drawing of an 8-unit by 3-unit garden divided into unit squares. Ask them to find the area and explain how counting the squares proves their answer.
Lesson moves
Ways to Teach It
Give pairs square tiles and paper rectangles, then have them cover each rectangle without gaps or overlaps and record the area.
Show two tiled rectangles with the same area and ask students to write how they know the areas are equal.
Play Area Match by pairing cards showing tiled rectangles, composite shapes, and matching area totals.
Measure a classroom tabletop with paper unit squares, then estimate how many squares would cover a larger table.
Free download
Printable 3.GSR.7.2 Worksheet
A ready-to-print activity worksheet aligned to 3.GSR.7.2, with an answer key for the teacher on its own page. No account needed.
PDF, US Letter, prints cleanly in black and white.
Download the worksheetKeep exploring
Related Standards
- 3.GSR.7.1
Investigate area by covering the space of rectangles presented in realistic situations using multiple copies of the same unit, with no gaps or overlaps, and det...
- 3.GSR.7
Identify area as a measurable attribute of rectangles and determine the area of a rectangle presented in real-life, mathematical problems.
- 4.GSR.8.3
Solve problems involving area and perimeter of composite rectangles involving whole numbers with known side lengths.
- 6.GSR.5.1
Explore area as a measurable attribute of triangles, quadrilaterals, and other polygons conceptually by composing or decomposing into rectangles, triangles, and...
Turn this exact standard into a lesson
Grade, subject, topic, and the complete standard are prefilled. Create one free, no account needed.