Question

Determine whether a tangent line to circle O is shown in the diagram, for AB = 7.75, OB = 4, and AO = 8.75. Explain your reasoning. (The figure is not drawn to scale.)

Answer 1

for ab to be the tangent <ABO must be a rt angle but it is not as
sqr(8.75) !=sqr(7.75) +sqr(4)
hence AB may not be tangent