Mathematics for IGCSE & O level - Circle Theorems (Section 2 - No. 13)
If two tangents from a point P are drawn to a circle with center O, and angle between the tangents is 60 degrees, what is the angle between the tangents and the radii at the point of contact?
30 degrees
60 degrees
90 degrees
120 degrees
คำอธิบาย
The radii are perpendicular to the tangents; thus, the angle is 90°.