Copy the triangles at right onto your paper.

1. Label the missing sides with their exact lengths. That is, leave your answers in radical form.

   Hint (a):

   Refer to your work from problem 9-4 in the previous lesson.

2. A $30^\circ-60^\circ-90^\circ$ triangle is sometimes called a half-equilateral triangle. Draw a picture to illustrate this, and explain how that fact can be used to help label the missing sides in part (a).

   Hint (b):

   What would happen if you changed the orientation of the triangle?

   Where would the line of symmetry lie?