2. Geometric Polygons 10 th Grade Geometry Laurie Grodziak Click Here Go to Main Screen

3. Click on a polygon to learn more about it: Triangle QuadrilateralPentagon Hexagon Heptagon Octagon Decagon Dodecagon Review

4. Triangle Has three sides and vertices Sum of interior angles = 180° Types of Triangles: Right Scalene Isosceles Equilateral Main Home

5. Quadrilaterals Has four sides and vertices Sum of interior angles = 360° Types of Quadrilaterals: Square Rectangle Parallelogram Trapezoid Rhombus Main Home

6. Pentagon Has five sides and vertices Sum of interior angles = 540° “Penta” is the Greek word for “five” Main Home

7. Hexagon Has six sides and vertices Sum of interior angles = 720° “Hexa” is the Greek word for “six” Main Home

8. Heptagon Has seven sides and vertices Sum of interior angles = 900° Also known as “septagon” Main Home

9. Octagon Has eight sides and vertices Sum of interior angles = 1080° “Octa” is the Greek prefix for “eight” Main Home

10. Decagon Has ten sides and vertices Sum of interior angles = 1440° “Deca” is the Greek word for “ten” Main Home

11. Dodecagon Has twelve sides and vertices Sum of interior angles = 1800° Main Home

12. Select the Best Answer for the Following Question: a. Heptagon Heptagon b. Pentagon Pentagon c. Hexagon Hexagon d. Dodecagon Dodecagon Which of the following polygons has the sum of its interior angles equals 720°? Main Home

13. Try Again! You are so close! The sum of a heptagon’s interior angles equals 800°. Click on the arrow to return back to the question! Return to Question

14. Try Again! You are so close! The sum of a pentagon’s interior angles equals 540°. Click on the arrow to return back to the question! Return to Question

15. Way to Go! You selected the right answer. The sum of a hexagon’s interior angles equals 720°. Click on the arrow to continue through the lesson! Continue

16. Try Again! This answer is incorrect. The sum of a dodecagon’s interior angles equals 1800°.Click on the arrow to return back to the question! Return to Question

17. Awesome Job! You have successfully learned about the geometric polygons! Click on any polygon below to return to the beginning of the lesson for the next student!