If the radius is 2 then the diameter is 2*2 = 4 inches and the circumference is about 12.6 inches and not 15 inches
The answer will depend on what 15 dm represents: the radius, diameter or even circumference!
The radius of a circle is half the diameter, thus your measurement is 30 inches
Use Circumference = 2 x radius x Pi Pi is 3.14159 appx. Therefore the circumference of your circle is 2 X 15 X 3.14159 inches or 94.25 inches or 7 feet 10 and 1 quarter inches
If the radius of a circle is 15 cm, the circumference is: 94.2 cm
You've stated an impossible question. If a circle has a circumference of 94.2 cm, it has a diameter of 30 cm. If it has a diameter of 15cm, it has a circumference of 47.1 cm.circumference = 2 * pi * radius = pi * diameterIf you had stated the question correctly (changed circumference to 47.1 cm OR changed diameter to 30 cm OR changed "diameter" to "radius"), then the answer would be:pi = circumference / diameter = (e.g.) 94.2 cm / 30 cm
Circumference = Pi multiplied by the diameter. C = (3.1415)(15 in.) = 47.12 in. Therefore, the circumference of a circle with a diameter of 15 in. and a radius of 7.5 in. is approximately 47.12 inches.
A circle with a radius of 15 inches has a circumference of: 94.2 inches.
About 4.712 inches.
R=D/2. If the diameter of a circle is 18 inches, the radius is 9 inches. Radius = 1/2 diameter or 9"
30 inches. The diameter is twice the length of the radius.
Circumference = 2*pi*rCircumference = 2*pi(15 inches)= 94 inches========
The answer will depend on what 15 dm represents: the radius, diameter or even circumference!
It is 15 times pi in inches
15/pi = 4.77"
Radius = 15 / 2 Pi or 2.3873 inches (rounded to 4th decimal).
Circumference = pi x diameter so if the radius is 5 then the diameter is 10 Circumference = pi x 10 = 31.415 If we triple the radius to 15, then the diameter is 30, so Circumference = pi x 30 = 94.245 Which looks like triple the first circumference. So if the radius is tripled, the circumference is also tripled.
Approx 4.8 inches.