measure of an angle formed by two intersecting chords
Check the final answer first, then review the worked steps.
Problem
measure of an angle formed by two intersecting chords
Step-by-step solution
The angle formed by two intersecting chords is half the sum of the intercepted arcs. The intercepted arcs are $131^\circ$ and $43^\circ$. So, $\angle RST = \frac{131^\circ + 43^\circ}{2} = \frac{174^\circ}{2} = 87^\circ$.
Answer
$87^\circ$