Geometrymedium · Past Paper
In a circle with center O, chord AB = 8 cm and the perpendicular distance from O to AB is 3 cm. Find the radius of the circle.
A4 cm
B5 cm
C6 cm
D10 cm
✓ Correct Answer: B — 5 cm
The perpendicular bisects the chord (4cm). Using Pythagoras: r^2 = 3^2 + 4^2 = 9 + 16 = 25, so r = 5 cm.
Share this question
More from Geometry
- The line segment joining a vertex of a triangle to the midpoint of the opposite side is the:
- Centroid divides the median in the ratio:
- If the areas of two similar triangles are in the ratio 16:25, what is the ratio of their corresponding sides?
- The sum of the altitudes of a triangle is _____ its perimeter.
- A triangle having two sides equal is called: