Respuesta :

Answer:

54 degrees

Step-by-step explanation:

I would turn this into a quadrilateral by connecting C to O and O to A.

The angles of a quadrilateral add up to 360 degrees.

So we have 90+90+126+angleABC=360

                            180+126+angleABC=360

                                  306+angleABC=360

                                           angleABC=360-306=54

Answer:

ABC = 54°

Step-by-step explanation:

Two tangent have been drawn from an external point B to the circle O.

These tangents touch the circle at points A and C.

Now as per Theorem of arcs and angles.

∠ABC = [tex]\frac{1}{2}[/tex]   [m(major arc AC) - m(minor arc AC)]

          = [tex]\frac{1}{2}[/tex]  [234 - 126]

         = [tex]\frac{1}{2}[/tex]  × (108)

         = 54°

Therefore, ABC = 54°

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