need Help. Any math geniuses out there?

Question

whats the formula for area of a circle as a function of its diameter,
the height of an equilateral as a function, the volume of a sphere as a function of the sphere's radius.

yes equilateral triangle

Answer 1

area of circle = pi * radius * radius
radius = diameter / 2

Can you piece the two pieces of information together?

Do you mean an equilateral triangle?

Sphere volume = 4/3 * pi * radius^3

Answer 2

1) Area of a circle is equal to pi times square of radius.

2) I assume you ask the height H of an equilateral triangle as a function of the side length L? Applying Pythagorean theorem, you should have H = square root of D where D is the difference between the square of L and the square of (L/2)

3) Volume of a sphere is (4/3) times Pi times R cubed where R is the radius

Answer 3

The area of a circle is pi r squared just divide the diameter by 2. Height of an equilateral triangle- just drop a perpendicular bisector and if the base is a calue x divide that by 2. If the other equal sides have a length y then height the square root of y squared - x/2 squared. Volume of a sphere is 4/3 pi r cubed. Hope this answers the question although it is a little vague.

Answer 4

pi * (d/2)^2 for an area of a circle

height = sqrt(3x^2/4) for the hieght

4/3 r^3 for a sphere volume

Answer 5

Area circle as fnctn of diam: A(d) = pi*(d/2)^2, or A(d) =(pi*d^2)/4

Vol. sphere: v(r) = (4/3)*pi*r^3

On the triangle, height as a function of what? Area? Side length?

Answer 6

try this link ..
http://www.geocities.com/kevinbisesser/AreaOfCircle.html

Answer 7

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