Flat shapes. Perimeters and areas.

María Morales Cruz, 19/10/2024

In this learning unit, students will explore the fundamental concepts of flat shapes, including types of polygons and their properties. They will learn how to calculate the perimeter and area of basic two-dimensional figures such as triangles, rectangles, and circles. Emphasis will be placed on understanding the relationship between shape, size, and space. For the final product, students will create a [b]tangram[/b], a geometric puzzle made up of seven flat shapes, demonstrating their ability to apply the concepts of area and perimeter while enhancing their spatial reasoning and creativity. Number of lessons: 10

Índice

  1. Lesson 1. Review of straight lines and angles.
    1. Watch this video at home.
    2. 1.1. Basic geometric elements.
    3. 1.2. Two important lines.
    4. 1.3. Angles.
    5. 1.4. Angles in polygons.
    6. True or false?
  2. Lesson 2. Polygons and other flat shapes.
    1. Polygons and other flat shapes.
    2. Tarea. Drawing flat shapes
  3. Lessons 3 and 4. Areas and perimeters of triangles and quadrilaterals.
  4. Lesson 5. Area and perimeter of regulars polygons.
  5. Lesson 6. Area and perimeter of circles.
  6. Lessons 7 to 9. Calculating areas and perimeters of composite figures.
  7. Lesson 10. Test.

1.

Lesson 1. Review of straight lines and angles.

Basic geometric elements, two important lines, angles, angular relationships and angles in polygons.

  • 1. Watch this video at home.
  • 2. 1.1. Basic geometric elements.
  • 3. 1.2. Two important lines.
  • 4. 1.3. Angles.
  • 5. 1.4. Angles in polygons.
  • 6. True or false?

1.1.

Watch this video at home.

Some help to understand the initial concepts of this unit.
– María Morales Cruz

1.2.

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1.3.

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1.4.

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1.5.

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1.6.

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2.

Lesson 2. Polygons and other flat shapes.

Polygons, triangles, quadrilaterals, circles.

  • 1. Polygons and other flat shapes.
  • 2. Tarea. Drawing flat shapes

2.1.

Polygons and other flat shapes.

Practice!
– María Morales Cruz

2.2.

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3.

Lessons 3 and 4. Areas and perimeters of triangles and quadrilaterals.

Measurements of quadrilaterals and triangles.


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4.

Lesson 5. Area and perimeter of regulars polygons.

Measurements of polygons. Pentagon and hexagon.


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5.

Lesson 6. Area and perimeter of circles.


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6.

Lessons 7 to 9. Calculating areas and perimeters of composite figures.

Learning how to reduce a complex shape in other simple figures. When we have the decomposition, we'll calculate the total area and perimeter.


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7.

Lesson 10. Test.


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