The radius of a circle is 9 cm. What is its diameter?
Note
The diameter is twice the radius because it is made of two radii in a straight line. So diameter = 2 × 9 = 18 cm.
The radius of a circle is 9 cm. What is its diameter?
The diameter is twice the radius because it is made of two radii in a straight line. So diameter = 2 × 9 = 18 cm.