Whats 9 times 8 trick question

Select the correct answer what is the most direct use of a compass in geometric constructions? a. to draw congruent angles b. to draw arcs of a given size c. to draw perpendicular lines d. to draw straight lines reset next next

The product of 3 and a number increased by 8 is 31

What is the measure of ba (the minor arc) in the diagram below?