If the diameter is 1.5m then the radius is 0.75 m. If the diameter is not 1.5m then it what is 1.5m?
True. The radius is half the diameter.
R (radius) X2. The radius is half the circle from the center of the circle. The diameter is just straight across.
4 * pi * radius * radius or (pi * diameter * diameter) / 3 Also ( 4 * 3.14 * radius squared ) Also ( 88/7 * radius squared )
The Earth is close enough to a sphere, so you can use the formula for a sphere: 4 x pi x r2. "r" is the radius; if you find the diameter of Earth somewhere, divide it by 2 to get the radius.The Earth is close enough to a sphere, so you can use the formula for a sphere: 4 x pi x r2. "r" is the radius; if you find the diameter of Earth somewhere, divide it by 2 to get the radius.The Earth is close enough to a sphere, so you can use the formula for a sphere: 4 x pi x r2. "r" is the radius; if you find the diameter of Earth somewhere, divide it by 2 to get the radius.The Earth is close enough to a sphere, so you can use the formula for a sphere: 4 x pi x r2. "r" is the radius; if you find the diameter of Earth somewhere, divide it by 2 to get the radius.
Depends on the information that you DO have. Half the diameter is the easiest formula, but that only works if you know the diameter.
Surface area of a sphere in square units = 4*pi*radius^2
you double the radius to find the diameter.
You need to know it's density to find the volume, then 4/3 pi r^3 to get radius, then double radius is diameter.
Mars is almost a sphere and the volume of a sphere is: 4/3*pi*radius3 So find its radius and its volume can be found using the above formula
diameter = 2*radius
Using the formula for the surface area of a sphere, which is SA = 4 (pi) r2, you can find the radius, and the diameter of the sphere is twice the radius. Example: If the surface of a sphere is 380 square cm 4 (pi) r2 = SA 4 (3.1416) r2 = 380 12.5664 r2 = 380 r2 = approx. 30.24 r = 5.5 and diameter D = 11 cm
Reverse the equation. Volume x 3/4 x 1/3.1416 = cubed root of radius. The radius is one half the diameter.