n the figure below, AC is tangent to circle B. BA is a radius of circle B and A is a point of tangency. If AB is equal to 85 and AC is equal to 110, what is the approximate measure of segment BC?
https://static.k12.com/eli/bb/259/3_25239/2_17287_2_25241/44412a2f55d50bd3e7d504b01a718c770488aa04/media/665b678cff372e4b2f9b44cd4da7757a722743d0/mediaasset_774452_1.jpg

Question

n the figure below, AC is tangent to circle B. BA is a radius of circle B and A is a point of tangency. If AB is equal to 85 and AC is equal to 110, what is the approximate measure of segment BC?
  https://static.k12.com/eli/bb/259/3_25239/2_17287_2_25241/44412a2f55d50bd3e7d504b01a718c770488aa04/media/665b678cff372e4b2f9b44cd4da7757a722743d0/mediaasset_774452_1.jpg

anonymous · Answer

i really need help please help

welshfella · Answer

the line joining the center of a circle to the point of contact of a tangent forms a right angle
So triangle ABC is a right angled triangle with angle  BAC = 90 degrees
you can therefore apply the pythagoras theorem to find the measure og BC

welshfella · Answer

BC^2 = 85^2 + 110^2

solve for BC

anonymous · Answer

thanks