Dylan wants to purchase a string of lights to put around the entire perimeter of the semicircular window shown below. 81604
What is the shortest length Dylan can purchase?

A.
55 inches

B.
90 inches

C.
110 inches

D.
145 inches

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.