Geometric Polygons

10th Grade GeometryLaurie Grodziak

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Click on a polygon to learn more about it:

Triangle Quadrilateral Pentagon Hexagon

Heptagon Octagon Decagon Dodecagon

Review

TriangleHas three sides and

verticesSum of interior angles =

180°Types of Triangles:

RightScaleneIsoscelesEquilateral

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QuadrilateralsHas four sides and verticesSum of interior angles = 360°Types of Quadrilaterals:

SquareRectangleParallelogramTrapezoidRhombus

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PentagonHas five sides and

verticesSum of interior

angles = 540°“Penta” is the Greek

word for “five”

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HexagonHas six sides and

verticesSum of interior

angles = 720°“Hexa” is the Greek

word for “six”

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HeptagonHas seven sides and

verticesSum of interior angles =

900°Also known as

“septagon”

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OctagonHas eight sides and

verticesSum of interior

angles = 1080°“Octa” is the Greek

prefix for “eight”

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DecagonHas ten sides and

verticesSum of interior

angles = 1440°“Deca” is the Greek

word for “ten”

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DodecagonHas twelve sides

and verticesSum of interior

angles = 1800°

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Select the Best Answer for the Following Question:

a. Heptagon

b. Pentagon

c. Hexagon

d. Dodecagon

Which of the following polygons has the sum of its interior angles equals 720°?

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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!

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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!

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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!

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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!

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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!