Use your triangle tools to solve the problems below.

1. What is $PR$ in the diagram above?

   Hint (a):

   Use the Law of Cosines to solve for segment $PR$.
   Relabel the parts of the triangle so they match the formula if you need more assistance.

   More Help (a):

   Refer to the Math Notes box in Lesson 7.2.3 if you need help remembering what this is.

2. What is the perimeter of quadrilateral $PQRS$?

   Step (b):

   Use the Law of Sines to find the measure of segment PS.
   If you need more assistance refer to Math Note Box in section 7.2.2.

   $\frac{\text{sin }35^\circ}{PS}=\frac{\text{sin }110^\circ}{PR}$

   Hint (b):

   Keep in mind $RS = PS$, because $ΔRSP$ is an isosceles triangle, because the base angles are equal at $35^\circ$ each.

   Answer (b):

   Perimeter $= 25.55$ cm