They are useful. They will let you answer anyone who asks you, "Well...why?" They will give you a great sense of satisfaction. They are cool.Geometry PASS Standard 2.3b requires them. (Apply the interior and exterior angle sum of convex polygons to solve problems, and verify using algebraic and deductive proofs.)but...

GOOD NEWS!!!

This is how happy I would be if I were you. Photo from http://www.abc.net.au/reslib/200710/r195023_740373.jpg.

Go watch the video on the "Exterior Angle Sums" page. Know how they derive the formula for the sum of the interior and exterior angles by showing how many triangles are in a polygon. THAT'S ALL FOR PROOFS FOR THIS SECTION!!!

## This is why we have to learn proofs:

They are useful. They will let you answer anyone who asks you, "Well...why?" They will give you a great sense of satisfaction. They are cool.Geometry PASS Standard 2.3b requires them.(Apply the interior and exterior angle sum of convex polygons to solve problems, and verify using algebraic and deductive proofs.)but...GOOD NEWS!!!Go watch the video on the "Exterior Angle Sums" page. Know how they derive the formula for the sum of the interior and exterior angles by showing how many triangles are in a polygon.

THAT'S ALL FOR PROOFS FOR THIS SECTION!!!