Answer:
Option C). 105°
Step-by-step explanation:
From the figure we can see a cyclic quadrilateral QRST
To find the measure of <RST
From the figure we can see that, angle RST is an obtuse angle.
The measure of angle RST is nearer to a right angle that is nearer to 90°
From the options we get the measure of angle RST = 105°
