Question

what is the measure of $overarc{efg}$ in $odot o$ below?
a. $300^circ$
b. $60^circ$
c. $120^circ$
d. $240^circ$

Explanation:

Step1: Total circle angle is 360°

The full measure of a circle's circumference is $360^\circ$.

Step2: Subtract central angle from total

Subtract the given central angle $\angle EOG = 60^\circ$ from $360^\circ$.
Expression: $360^\circ - 60^\circ = 300^\circ$

Answer:

A. $300^\circ$