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Geometric Polygons 10th Grade Geometry Laurie Grodziak Click Here Go to Main Screen Click on a polygon to learn more about it: Triangle Quadrilateral Heptagon Octagon Pentagon Decagon Hexagon Dodecagon Review Triangle Has three sides and vertices Sum of interior angles = 180° Types of Triangles: Right Scalene Isosceles Equilateral Main Home Quadrilaterals Has four sides and vertices Sum of interior angles = 360° Types of Quadrilaterals: Square Rectangle Parallelogram Trapezoid Rhombus Main Home Pentagon Has five sides and vertices Sum of interior angles = 540° “Penta” is the Greek word for “five” Main Home Hexagon Has six sides and vertices Sum of interior angles = 720° “Hexa” is the Greek word for “six” Main Home Heptagon Has seven sides and vertices Sum of interior angles = 900° Also known as “septagon” Main Home Octagon Has eight sides and vertices Sum of interior angles = 1080° “Octa” is the Greek prefix for “eight” Main Home Decagon Has ten sides and vertices Sum of interior angles = 1440° “Deca” is the Greek word for “ten” Main Home Dodecagon Has twelve sides and vertices Sum of interior angles = 1800° Main Home Select the Best Answer for the Following Question: Which of the following polygons has the sum of its interior angles equals 720°? Heptagon b. Pentagon c. Hexagon d. Dodecagon a. Main Home 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 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 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 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 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!