Geometrymedium · Past Paper
In the figure, O is the center and AB is a diameter. C is a point on the circle such that angle ABC = 30 degrees. Find angle BAC.
A30 degrees
B60 degrees
C90 degrees
D120 degrees
✓ Correct Answer: B — 60 degrees
Angle ACB = 90 (semi-circle). BAC = 180 - 90 - 30 = 60 degrees.
Share this question
More from Geometry
- In a cyclic quadrilateral ABCD, if angle A - angle C = 60 degrees, find angle A.
- Find the length of the direct common tangent to two circles of radii 12 cm and 7 cm, if the distance between their centers is 13 cm.
- If the supplement of an angle is 2/3 of its reflex angle, find the angle.
- Two angles are such that their difference is 20 and their sum is 100. Are they?
- If a line makes an angle alpha with the x-axis, its slope is: