Geometrymedium · Past Paper
A point P is 25 cm from the center of a circle and the length of the tangent from P is 24 cm. The radius of the circle is:
A7 cm
B10 cm
C12 cm
D15 cm
✓ Correct Answer: A — 7 cm
r^2 = 25^2 - 24^2 = 625 - 576 = 49. r = 7 cm.
Share this question
More from Geometry
- The area of the circumcircle of an equilateral triangle with side 6 is:
- The slope of the line x = 5 is:
- Find the angle subtended by a chord of length equal to the radius at the center.
- Three circles of radius 1 cm touch each other externally. What is the area of the region enclosed between them?
- What is the angle in a segment greater than a semi-circle?