Geometryeasy · Past Paper
If a chord of length 8 cm is at a distance of 3 cm from the center, what is the radius?
A4 cm
B5 cm
C6 cm
D7 cm
✓ Correct Answer: B — 5 cm
Using Pythagoras: r^2 = (chord/2)^2 + distance^2 = 4^2 + 3^2 = 16 + 9 = 25. r = 5.
Share this question
More from Geometry
- In a cyclic quadrilateral ABCD, if angle A - angle C = 60 degrees, find angle A.
- In triangle ABC, angle B = 90 and AC = 2 AB. Find angle C.
- If a circle passes through the vertices of a triangle with sides 3, 4, and 5, what is the radius of the circle?
- Calculate the area of a triangle with sides a=7, b=8, c=9.
- A circle is inscribed in a right-angled triangle with sides 6, 8, and 10. Find its radius.