Question

this is the question I don't understand how to to do

http://tinypic.com/view.php?pic=14n3ix4&s=6

Answer 1

\(\angle RTS\) is the average of the two arcs subtended by the vertical angles

Answer 2

Recall these theorems:
(1) The measure of an inscribed angle of a circle is 1/2 its intercepted arc.
(2) In a circle, inscribed angles that intercept the same arc or congruent arcs are congruent.

Question: What is the measure of angle R?
@primadonnagirl123