Question

In the figure, O is the centre of a circle, AC is a diameter. If ACB = 50°,

then find the measure of BAC .​

Answer 1

Answer:

See,

If You Remember The Theorem, Angle Subtended Opposite to the Diameter in a Circle is 90°

Now You know the Two Angles:

ACB is 50°

ABC is 90°

So the Third Angle will be,

BAC = 180° - (90 + 50)°

       = 40°