Geometry textbooks provide area formulas for some shapes.
But there are a whole host of shapes most books leave out. My Geometry students set out to find an area formula for each one. Below are the areas of the "H", the Boat, the Star, the House, the "V", the Bow Tie, and the Arrow.
If you'd like to try the assignment yourself, you can download it below.
I started this blog to share my transformation from math nerd to math nerd who loves to share math with young people. I teach high school in Hanoi, Vietnam. Your comments are always welcome.