ANY TANGENT TO A CIRCLE IS PERPENDICULAR TO THE ALL THE SAME LENGTH...

4. Any tangent to a circle is perpendicular to the all the same length; thus, ΔPNTand ΔPRN are equilateral triangles and their radius drawn to the point of tangency.angles are all 60°. Now you can find the area ofBthe left half of the shaded region.8rThis is the area of the sector

R

minus the area of ΔRNT.SinceCA D6 r∠RNT is 120°, the sector is

6

3

√

3