K-5 friendly lesson
Try one idea, then jump into the activity.These lessons are designed to feel short, friendly, and easy to follow.

Identify Pentagons

⬟ The Magic 5! Geometry is just counting the straight lines. If it has exactly five corners and five sides, it joined the secret club.

Lesson 3

Concept

Shapes have specific names based entirely on how many straight sides they have. šŸŽÆ **The Pentagon Rules:** 1. It must have **straight lines**. No curves allowed! 2. It must be closed! No open gaps. 3. It must have exactly **5 sides**! It DOES NOT have to look like a perfect little house. If it is completely squished, bent, or completely weird looking... but it has 5 straight sides connecting to 5 corners... it is legally a Pentagon.

Try it

Count the lines! **Instructions:** Count the straight sides of the shape. If it hits 5, it's a pentagon! **Problem 1:** You see a triangle. (3 sides). Is it a pentagon? * Answer: ________ **Problem 2:** You see a square. (4 sides). Is it a pentagon? * Answer: ________ **Problem 3:** You see a shape that looks exactly like a baseball home plate. (Pointy on top, straight on the bottom). It has 5 sides. Is it a pentagon? * Answer: ________ **Problem 4:** You see a weird squished shape that looks like an arrow pointing to the right. It has 1, 2, 3, 4... 5 straight lines! * Is it a pentagon? (Yes / No)