Around the Geometry Section in 180 degrees

Just as Phileas Fogg made it around the world in 80 days, you can navigate around the Geometry section using just 180 degrees. Here’s how:

Around the problem in 180 degrees

Knowing these two rules can unlock many esoteric questions.

1. There are 180 degrees in a straight line.
2. There are 180 degrees in a triangle.

Let’s look at these in the wild.

Here’s another hard problem where you can leverage these two rules to solve it.

Your turn

Can you get around this problem in 180 degrees?

What is the value of c in terms of a and b?