If the radius of a circle is 7.75 cm, then its diameter measures ___cm.
True
False
16.5
15.5
Diameter = 2 × Radius
Diameter = 2 × 7.75
Diameter = 15.5 cm
If the circumference of a circle exceeds its diameter by 180 cm, then find its radius in cm.
If diameter of a circle is 18 cm, then the radius is ____ cm.