The area A of a circle as a function of its diameter d; the area of a circle of diameter 4

Mathematics

1 answer:

choli [55]3 years ago

4 0

Answer:

The formula used to calculate circle area is: A = π x (ø/ 2) 2. Symbols. A = Circle area; π = Pi = 3.14159… ø = Circle diameter; Diameter of Circle. Enter the diameter or two times the radius of a circle. Area of Circle. This is the area contained within a circle with the specified diameter.

Step-by-step explanation:

If JavaScript is not working on your browser, or in case you are simply curious, here is the procedure for calculating the diameter of a circle from its area. For an example, we have an area of 303,000 square meters.

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Step-by-step explanation:

Given:

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Rewriting the above equation into a standard quadratic equation and solving for 't', we get:

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Using quadratic formula to solve for 't', we get:

$t=\frac{-b\pm \sqrt{b^2-4ac}}{2a}\\\\t=\frac{-(-15)\pm \sqrt{(-15)^2-4(2)(7)}}{2(2)}\\\\t=\frac{15\pm \sqrt{225-56}}{4}\\\\t=\frac{15\pm\sqrt{169}}{4}\\\\t=\frac{15\pm 13}{4}\\\\t=\frac{15-13}{4}\ or\ t=\frac{15+13}{4}\\\\t=\frac{2}{4}\ or\ t=\frac{28}{4}\\\\t=0.5\ s\ or\ t=7\ s$