If the radius of a circle is 8 cm then its diameter is ___.
12 cm
10 cm
4 cm
16 cm
Diameter = 2 × radius Radius = 8 cm Therefore diameter = 2 × 8 = 16 cm
A circle with centre O in which diameter AB bisects the chord CD at point E. If CE = ED = 8 cm and EB = 4 cm, the radius of the circle is
If the diameter of a circle is 32 cm, its radius is equal to ___ .