<< Back to Lessons Index

7th Grade Math / Lesson 6A: Polygons

POLYGONS
What will we be learning in this lesson?


  • In this lesson, you will learn about the different types of polygons.
Vocabulary words are found in this purple color throughout the lesson. Remember to put these in your notebook.


POLYGONS
 
 
  • Polygons are closed figures made of three or more sides.
 Triangle:  a polygon made up of 3 sides
 
 Quadrilateral:  a polygon made up of 4 sides
 
 Pentagon:  a polygon made up of 5 sides
 
 Hexagon:  a polygon made up of 6 sides
 
 Octagon:  a polygon made up of 8 sides
 
  • Regular polygons are polygons that have all sides and all angles equal.
 


POLYGONS


  • Quadrilaterals are polygons that have 4 sides. There are many types of quadrilaterals.

    Trapezoid: a quadrilateral with only one pair of parallel sides.

    Parallelogram: a quadrilateral with opposite sides that are parallel and equal in length.


    Rhombus: a quadrilateral with OPPOSITE sides parallel and ALL sides equal in length.


POLYGONS


Rectangle: a quadrilateral with OPPOSITE sides parallel and equal in length with only right angles.


Square: a quadrilateral with OPPOSITE sides parallel, ALL sides equal in length, and only having right angles.

Notice the definition of the square is similar to the definitions of rhombus and rectangle.


POLYGONS



Here is the break down for quadrilaterals (shapes with 4 sides)


  • Can you identify the polygon by the number of sides it has?
  • Can you differentiate between the types of quadrilaterals?
  • Go back to the classroom to get to your homework and any other items you need to attend to.