Shape Explorer

Resources and Tools for Elementary Math Specialists and Teachers

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This interactive Java applet allows users to explore perimeter and area and the relationship between them. The activity gives irregular shapes or rectangles on a grid, and then the user enters the perimeter and area of the figure. An optional scoring feature allows users to keep track of the number correct.

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(1 Comments)

Contributed by: Shodor, Publisher

Math TopicMeasurement, Mathematical Practices, Mathematical Processes

Grade Level3, 4, 5

Resource TypeInteractive Media

Additional Information
- AudienceLearner
- LanguageEnglish (USA)
- Education Topic
- Interdisciplinary Connection
- Professional DevelopmentNo
- ContributorShodor, Publisher
- Publication Date2003
- RightsCreative Commons Attribution-NonCommercial 3.0 Unported License
  http://www.shodor.org/interactivate/licensing
- AccessFree access
Standards
- Common Core State Standards for Mathematics
  Select a standards document:
- Standards for Mathematical Practice[K-12]
- Reason abstractly and quantitatively.[K-12]
- Measurement and Data[K - 5]
- Geometric measurement: understand concepts of area and relate area to multiplication and to addition.[3]
- 6. Measure areas by counting unit squares (square cm, square m, square in, square ft, and improvised units).[3]
- 5. Recognize area as an attribute of plane figures and understand concepts of area measurement.[3]
- a. A square with side length 1 unit, called "a unit square," is said to have "one square unit" of area, and can be used to measure area.[3]
- b. A plane figure which can be covered without gaps or overlaps by n unit squares is said to have an area of n square units.[3]
- 7. Relate area to the operations of multiplication and addition.[3]
- a. Find the area of a rectangle with whole-number side lengths by tiling it, and show that the area is the same as would be found by multiplying the side lengths.[3]
- b. Multiply side lengths to find areas of rectangles with whole-number side lengths in the context of solving real world and mathematical problems, and represent whole-number products as rectangular areas in mathematical reasoning.[3]
- Geometric measurement: recognize perimeter as an attribute of plane figures and distinguish between linear and area measures.[3]
- 8. Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters.[3]
- Geometry[K - 8]
- Reason with shapes and their attributes.[1 - 3]
- 2. Partition a rectangle into rows and columns of same-size squares and count to find the total number of them.[2]
Related Resources
- Area Explorer
- Perimeter Explorer
- Shape Builder
User Comments
- Average
  5
  
  Amazing info
  By Upood1938 on 04/30/2018 - 01:19
- Mathematics is always being so interesting for me because it can improve my calculation powers as well as intellect and bestessays review share good info. Actually this post is for the students of grade 3, 4, 5. But I also feel good for having myself here and so to understand the shapes is very interesting.

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and the International Society for Technology in Education. © 2013 Maryland Public Television

Shape Explorer

Common Core State Standards for Mathematics