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Understanding Quadrilaterals and Polygons: Types, Properties, and Fun Activities

In this lesson, we explore the world of polygons, defined as flat, closed figures made up of three or more straight sides. Key terms include vertices, which are the points where sides meet. We categorize polygons by the number of sides, such as triangles (3), quadrilaterals (4), pentagons (5), hexagons (6), and octagons (8). Special types of quadrilaterals include rectangles, squares, trapezoids, parallelograms, and rhombuses. Engage with a fun game involving dice to reinforce your knowledge of these shapes!

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Understanding Quadrilaterals and Polygons: Types, Properties, and Fun Activities

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  1. Chapter 15 Lesson 3 Quadrilaterals and Other Polygons

  2. A polygon • is a flat, closed figure that is made up of three or more straight line segments called sides . • FLAT • CLOSED • 3 or MORE STRAIGHT SIDES

  3. A vertex • is the point where two sides of a polygon meet. • Show me a vertex! • Hint- Remember the Very, Very Tickly spot?

  4. A polygon can be named by the number of sides it has. These Are Polygons:

  5. Triangle“tri” means 3 • 3 sides • 3 angles

  6. Quadrilateral“quad” means 4 • 4 sides • 4 angles

  7. Pentagon“pent” means 5 • 5 sides • 5 angles

  8. Hexagon“hex” means 6 • 6 sides • 6 angles

  9. Octagon“octo” means 8 • 8 sides • 8 angles

  10. These Are Not Polygons:Can you tell me why?

  11. Some Quadrilaterals Have Special Names

  12. A rectangle • has opposite sides that are parallel • four right angles.

  13. A square • has four sides of the same length • four right angles

  14. A trapezoid • has only one pair of parallel sides. What does that sound like? TRAP reminds me of a trap that gets skinnier and skinnier as you go in! Then, POOF! You are trapped!

  15. A parallelogram • has opposite sides that are parallel.

  16. A rhombus • has opposite sides parallel • four sides of the same length.

  17. Quadrilateral Game Each student needs to get one dice, a pencil, and a piece of paper.

  18. You and the person across from you are partners. If we have a group of 3, that is fine too!

  19. Take turns rolling the diceand name the figure that has that many sides.(1 and 2 rolls do NOT make quadrilaterals. Skip to the next player.)

  20. See how many you can quietly get right in the next 2 minutes.

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