The ideas in this geometry lesson are taken from the Geometry ebook that I sell at MathMammoth.com. This lesson plan does not contain all the problems the Geometry ebook does.
Free geometry lesson plan from HomeschoolMath.net
Polygons are closed figures that have several line segments and
Triangles are polygons with three sides.
Quadrilaterals are polygons that have four
sides (quattuor = four, lateralis = side).
Other polygons include
Example problem types
1. a) Draw four dots on paper at random so that connecting them
you will get a quadrilateral that is not a square, rectangle or
b) Measure the angles of your quadrilateral. What is the sum of the angles?
c) Draw a diagonal into it so that it divides it into two triangles. Using the triangles explain why the sum of the angles in a quadrilateral has to be what it is.
3. A regular hexagon is a hexagon whose all sides and angles are equal. Look at the pictures to learn how to construct a regular hexagon. Then draw one in your notebook using compass and ruler.
|Draw an equilateral triangle
with the usual method and
also another triangle under-
|Extend the sides of
the triangles until they
meet the circumference
of one of the citrcles.
|Connect the points where
the extended lines met the
circumference, and you get
a regular hexagon.
5. A regular pentagon is a pentagon whose sides and angles are equal. Each angle of a regular pentagon is 108 degrees. Using that fact draw one. You can choose the length of the side.
New terms to remember: