- Or create your own photobook in seconds.
- Create now!

Hello, you either have JavaScript turned off or an old version of Adobe's Flash Player.
Get the latest Flash player.

BC: Thank you!

FC: Polygons

1: A Polygon is a closed shape that has 3 or more straight line segments with no intersecting lines. Any shape that does not follow this description is not a polygon.

2: Triangles | A triangle is a polygon with 3 sides, 3 angles, and 3 vertices. Triangles can be classified by the length of their sides or the size of their angles | You can determine when a triangle is a scalene when there are no equal sides or no equal angles. | You can determine when a triangle is an isosceles when it has two equal sides and two equal angles. | You can determine when a triangle is an equilateral when all of the sides and angles are equal. | Three common triangles are the scalene, isosceles and equilateral triangles.

3: Triangles have 3-letter names. You name a triangle by using the letters of the vertices. | The sum of the angles in a triangle equals 180 . | The above triangle is an isosceles triangle. The two sides on the triangle are the same length.

4: Quadrilateral | A Quadrilateral is a polygon that has four sides, four vertices, and four angles. Quadrilaterals can be a square, a rectangle and a rhombus. | A square is a type of quadrilateral. A square is a quadrilateral because it has four sides, four vertices, and four angles. | The total angle sum of a quadrilateral is 360 degrees. Two triangles can make a square. The angle sum of one triangle is 180 degrees. Two triangles can fit into a square which would make the angle sum of a quadrilateral 360 degrees. | The picture above is an example of an irregular quadrilateral.

5: The picture above is an example of a square from a shopping basket. It is a quadrilateral. | The picture above is crown molding in our kitchen. It is shaped as a rectangle. It is another example of a quadrilateral. | The picture above is a rhombus. it is another example of a quadrilateral.

6: Pentagon | A pentagon has five sides, five vertices and five angles. | The total angle sum for a pentagon is 540 degrees because three triangles can make a pentagon and the total angle sum for a triangle is 180 degrees, so a pentagon's total angle sum is 540 degrees | The picture above shows a regular pentagon. A regular pentagon is when the shape has all equal angles and sides.

7: The picture above shows an irregular pentagon. An irregular pentagon is when it doesn't have all sides and angles equal with another.

8: Hexagon | A hexagon has six sides, six vertices, and six angles. | Four triangles can make a hexagon and the total sum of a triangle is 180 degrees, so the full total sum of a hexagon is 720 degrees. | The picture above shows a regular hexagon.

9: The picture above shows an irregular hexagon.

10: Octagon | A octagon has eight sides, eight vertices, and eight angles. | Six triangles can make an octagon, so 180x6=1,080, so the total angle sum of a octagon is 1,080 degrees. | The picture above shows a regular octagon.

11: The picture above shows an irregular octagon.

12: Decagon | A decagon has ten sides, ten vertices, and ten angles. | Eight triangles can make a decagon, so 180x8=1,440, so the total angle sum of a decagon would be 1,440 degrees. | The top of the cup above shows a regular decagon.

13: The picture above shows an irregular decagon.

14: Dodecagon | A dodecagon has twelve sides, twelve vertices, and twelve angles. | The total angle sum of a dodecagon would be 1.800 because there are 10 triangles in a dodecagon, so 10x180= 1,800 degrees. | The picture above represents a Irregular dodecagon.

**By:**Addison s.**Joined:**over 5 years ago**Published Mixbooks:**2

No contributors

**Title:**Poygons- Theme for Mixbook Scrapbookers
**Tags:**None**Published:**over 4 years ago

Get up to **50**% off your first order!

or

By clicking on the Create button, you agree

to Mixbook's Terms of Service.

to Mixbook's Terms of Service.

Welcome back! Go ahead and Log In

or

Your first order