Step 1: Recall what what is the inscribed angle and arc measurement
(or central angle)
NOTE:An inscribed angle is an angle whose vertex sits on the
circumference of a circle. The vertex is the common endpoint of
the two sides of the angle.
A central angle(arc measurement) is any angle whose vertex is
located at the center of a circle.
Step 2: Identify the relation between these two angles.
NOTE: The central angle is always twice the inscribed angle.
Step 3: Calculate the unknown angle by substituting the known value
Inscribed angle =\frac{Central\ angle}{2}
Inscribed angle = \frac{13}{2}
