circumference = diameter x pi area = radius squared times pi divide circ with pi gives you the diameter diameter/2 gives you radius radius times itself times pi gives you the area get the units right and you're done.
Diameter is half of the radius. Times it by 2.
The area increases as the square of the radius (or diameter). So if you double the radius you * 4 (quadruple) the area. Treble the radius, you *9 the area.
Circumference = 2*pi*radius Radius = Circumference/(2*pi)
Multiply the radius by itself, then multiply the result by Pi.
To convert diameter to area , you will need to divide the diameter by two so as to get the radius. The result you get, square it and them multiply it by 3.14 to find the area.
To convert radius miles into square miles, you would need to use the formula for the area of a circle: A = πr^2, where r is the radius. Square the radius value, then multiply it by π (approximately 3.14) to get the area in square miles.
assuming the island is circular.... use the formula Area=(pi)x(radius squared) to find the radius, then use the formula C=2(pi)(radius) to determine the circumference.
First find the area of the cylindrical bar or cylinder area = 2 · π · r · (r + h). Convert your measurements to the lesser of the two (cm is smaller than meters, so they both need to be cm). Plug your numbers into the formula and solve for area. Next, use a sphere area formula to solve for radius area = 4 · π · r2. Enter the area number you found from the first equation and solve for (r) or radius. Once you arrive at your answer (you need to practice math to learn it), you need to convert your measurement back to meters. Good luck!
circumference = diameter x pi area = radius squared times pi divide circ with pi gives you the diameter diameter/2 gives you radius radius times itself times pi gives you the area get the units right and you're done.
2 x pi x radius
Diameter is half of the radius. Times it by 2.
The area increases as the square of the radius (or diameter). So if you double the radius you * 4 (quadruple) the area. Treble the radius, you *9 the area.
The area of a semicircle is half of the area of a circle. The area of a circle is pi x radius x radius. So the area of a semicircle is 1/2 x pi x radius x radius or (pi x radius x radius) / 2.
Area = π × radius² → radius² = area/π → radius = √(area/π) Circumference = 2 × π × radius = 2 × π × √(area/π) = √(2² × π² × area/π) = √(4 × π × area)
The area increases as the square of the radius (or diameter). So if you double the radius you * 4 (quadruple) the area. Treble the radius, you *9 the area.
Circumference = 2*pi*radius Radius = Circumference/(2*pi)