Geometry
# Solving Triangles

What is \( x? \)

What is \( x \)?

Which of these is equivalent to \( \cos(a) \)?

What is the length of \( \overline{AB}? \) (marked in red)

Earlier, we used angles to help solve for side lengths of right triangles. Let's see if we can reason with side lengths to solve for angles.

What is \( \delta \) in *radians*?