Mathematics for IGCSE & O level - Circle Theorems (Section 3 - No. 3)
If two tangents are drawn to a circle from a point outside the circle and form an angle of 60 degrees, what type of triangle is formed by the tangents and the segment joining the center of the circle to the external point?
Equilateral
Isosceles
Scalene
Right-angled
설명
Since the tangents are equal in length and the angle formed is 60 degrees, an equilateral triangle is formed.