Geometric shapes on the plane
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This unit deals with the most important geometric shapes on the plane: the triangle, the square, the rectangle, the parallelogram, the rhombus and the trapezium, and focuses on their area. As they are all two-dimensional we can say that they "live on the plane", unlike a matchbox (rectangular parallelepiped) which is three-dimensional and therefore "lives in three-dimensional space". Polygons are other kinds of plane shapes which you can find out about in the unit on Measuring Polygons.
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This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
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publisher
INTEF
21/01/2026
publisher
INTEF .
21/01/2026
publisher
INTEF
21/01/2026
author
Agustín Muñoz Núñez
21/01/2026
publisher
Institute of Educational Technologies (ITE)
21/01/2026
editor
Institute of Educational Technologies (ITE)
21/01/2026
technical validator
José María Aína Martínez
21/01/2026