The diameter would be 8cm, because the diameter is always double the radius.
That's why the formula 2'Pi'r is also known as 'Pi'd.
Diameter: 2*4 = 8 cm
if a radius is 5cm the diameter is 10cm rule- you double the radius
8cm. The radius is always half the diameter.
circumference formula is pi(diameter) diameter is 2(radius) radis=4; diameter=2(4)=8 pi(8)=circumference of the circle...this is the EXACT answer plug it into a calculator and you will get 25.1327412287 your welcome ;)
8 units; the diameter of a circle is twice its radius.
The diameter of a circle is twice the radius. Since the radius of the 2 cm circle is 2 cm, the diameter is 2 x 2 cm, which equals 4 cm. Therefore, the diameter of the 2 cm circle is 4 cm.
Radius = 1/2 of diameter = 4 cm
Its radius is: 4/2 = 2 cm
Diameter: 2*4 = 8 cm
diameter =2*radius =2*2 cm = 4 cm
2 cm
Radius = Diameter / 2 In this case, diameter = 8 cm so radius = 4 cm
if a radius is 5cm the diameter is 10cm rule- you double the radius
8cm. The radius is always half the diameter.
10 cm
It is: 2*4 = 8 cm
Radius of a circle with diameter 4? Radius is half of the diameter, so in this case it would be 2.