Triangle ABC is inscribed in circle 0, What is the measure of A?

do you mean add both of the equations together

because if you do the answer is 10x-5

step-by-step explanation:

i think the answer would be c

dont't really have enough info here but its likely

sss for the three sides being congruent ( its stands for side side side)

or

sas   for side angle side.   so a side is congruent and and angle and a side