Finding Area in Different Ways: Warmup Problem

 

  1. On the graph paper provided, mark the points (1,1), (1, 9), and (5,9).   Connect them to make a right triangle.   How do you know it is a right triangle?

 

 

  1. What is the area of this triangle?  Explain how you found the area.

 

 

  1. Draw another right triangle, with vertices different from (1,1), (1,9), and (5,9).   What is the area of your right triangle?  Explain how you found the area.