I find the area of two triangles where the base and altitude are not given - so I have to actually DRAW the altitude to the triangle, and then measure it. I show you how to use a protractor to draw the altitude.
Lastly we look at a drawing problem: draw a triangle with an area of 200 square centimeters.
The 1st part of this lesson explains the formula for the area of a triangle and where it comes from:
This lesson is meant for 6th grade math.
Check out also the free Math Mammoth worksheets and books at http://www.mathmammoth.com/free
Tagged under: 6th grade,math,area triangle,draw altitude,altitude,altitude triangle,base,area, protractor,protractor
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