Using proportions, it is found that the measure of the inscribed angle B is of 30º.
What is a proportion?
A proportion is a fraction of a total amount, and the measures are related using a rule of three.
In a circle, the inscribed angle is half the measure of the outside angle. Hence, in this problem, the measure of angle B is of 50% of 60º, hence:
m<B = 0.5 x 60º = 30º.
More can be learned about proportions at https://brainly.com/question/24372153
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