Geometryhard · Past Paper
If the length of a tangent from a point P to a circle is 24 cm and the distance of P from the center is 25 cm, find the radius.
A7 cm
B12 cm
C15 cm
D20 cm
✓ Correct Answer: A — 7 cm
r = sqrt(25^2 - 24^2) = sqrt(625 - 576) = sqrt(49) = 7 cm.
Share this question
More from Geometry
- In the given figure, O is the center. If angle AOB is 100 degrees, find angle ACB.
- If a cyclic trapezium has its non-parallel sides equal, what kind of trapezium is it?
- Find the equation of a line passing through (1, -1) and perpendicular to the line x + 2y = 3.
- The perpendicular distance from (1, 1) to the line 3x + 4y - 12 = 0 is:
- Find the equation of a line whose x-intercept is 3 and y-intercept is 4.