1. Look at the shapes below. How do I know which ones are pentagons?

2. In this lesson you will learn how to identify pentagons by finding shapes with 5 straight sides that meet at 5 corners.

3. Core Lesson A pentagon has 5 sides! 1 2 3 4 5

4. Let’s find the pentagon. 1 2 2 3 4 1 3 1 3 4 2 5 Which one has 5 sides? The shape on the left is the pentagon!

5. Let’s Review All 5 sides of a pentagon must be straight!

6. Core Lesson Let’s find the pentagons. Which one does not have 5 straight sides? The shape in the middle is not a pentagon!

7. Let’s Review All sides must meet or connect!

8. Core Lesson Let’s find the pentagons. Which one does not have 5 corners? The shape on the left is not a pentagon!

9. A Common Misunderstanding This is not a pentagon!

10. Core Lesson Look at the shapes below. Which ones are pentagons? 2 3 4 1 5 2 34 1 5

11. Core Lesson You can identify a pentagon! Pentagons have 5 sides. 1 All sides are straight. 2 All sides meet at a corner. 3

12. In this lesson you learned how to identify pentagons by finding shapes with 5 straight sides that meet at 5 corners.