We used a TI-Nspire animation to show how the formulas of area of a triangle and trapezoid are related to the area of a parallelogram. We also saw how the area of a parallelogram related to the area of a rectangle with the same base and height.
We applied these formula (as well as our area of circle = pi*r^2) to find the area of a composite figure or a a shaded region.
Use the links below for more practice/help
http://www.youtube.com/watch?v=Eb_GYmtA45o
https://www.youtube.com/watch?v=xUSjQq3jL6o
http://www.youtube.com/watch?v=by9-_95Zn08 (in this video breadth = width)
HW: Complete WS 1 - 12 Area of different figures in the Area packet.