1. Polygons
Lesson 16-7
4.G.2
Literature Link: Shape Up! Fun with Triangles and Other Polygons David Adler

2. MATH Essential Questions
How can lines, angles, and shapes be described, analyzed, and classified?
MATH
Essential
Questions

3. MATH Essential Questions
How are angles measured, added, and subtracted?
MATH
Essential
Questions

4. Warm Up
Marta and Jeremy are planting a garden. Marta plants 4 rows and puts 8 plants in each row. Jeremy plants 6 rows and puts 4 plants in each row. Who plants more, Marta or Jeremy? How many more plants does this person plant? Explain.

5. Think and Write
What are some flat classroom objects that have only straight sides?
Possible answers: chalkboard/whiteboard, windows, desk top, book cover

6. Today’s Lesson
In this lesson, you will learn how to identify and name polygons.
Let’s look at the Envision Video for this lesson and take the quiz.

7. Polygons
A polygon is a closed flat shape with straight sides. Some examples of polygons are triangles, quadrilaterals (squares, rectangles, and trapezoids), pentagons, and octagons.
Would a circle be a polygon? Why or why not?

8. Polygon or Not?
Classify the shapes as a polygon or not a polygon based on the definition and attributes of polygons.

9. Triangles
Triangles are polygons. Triangles have 3 sides and 3 vertices, or corners.

10. Quadrilaterals
Quadrilaterals are also polygons. Some examples of quadrilaterals are squares, rectangles, rhombuses, trapezoids, and parallelograms.
How many sides do they have?
How many vertices do they have?

11. Pentagons Pentagons are polygons. How many sides do they have?
How many vertices do they have?
You can integrate Social Studies by showing students a picture of the Pentagon building and asking them why it was given that name. Explain the purpose of the building (USA national security)

12. Hexagons These shapes are hexagons, which are also polygons.
How many sides do they have?
How many vertices do they have?

13. Octagons
Octagons are polygons. What does the prefix “oct” mean? Hint: Think of an octopus.
How many sides does an octagon have?
How many vertices does an octagon have?

14. Lesson Wrap Up
In this lesson, you learned about triangles, quadrilaterals, pentagons, hexagons, and octagons.
Next, you will plot points on a coordinate grid, connect the points, and name the polygon.
Homework (16-7 Practice) for one “Paw Signature” and (16-7 Re-teaching & Practice) if you want two “Paw Signatures.”
Website for Practice: /shapeshoot/PolygonShapesShoot.htm