Posted by **Anonymous** on Saturday, January 10, 2009 at 9:10pm.

if i am given the are and the minor ellipse... how do i find the major ellipse?

is there any formula...plz help

- math -
**Damon**, Saturday, January 10, 2009 at 9:20pm
for a circle area = pi r^2

for an ellipse area = pi (minor half length*major half length)

notice that if the major equals the minor, the ellipse is a circle and the formulas are the same.

- math -
**drwls**, Saturday, January 10, 2009 at 9:21pm
I assume you mean the minor and major AXIS of the ellipse.

Let a be half the major axis and b be half the minor axis.

The area of the ellipse is

A = pi*a*b

Since you know A and b, you can solve for a.

## Answer This Question

## Related Questions

- math - An ellipse and a hyperbola have the same foci, $A$ and $B$, and intersect...
- trig/ellipse equation - Find an equation of an ellipse satisfying the given ...
- geometry - The area of an ellipse in the form (x*x/a*a)+(y*y)/(b*b)=1 is A=3.14*...
- Algebra II - Could someone please check these. For ellipse: (x-2)^2/49 + (y+1)^2...
- maths - Given the equation of an ellipse is 4x^2 + y^2 + 24x - 6y + 9 = 0 (i) ...
- Math - Find an equation in standard form for the ellipse that satisfies the ...
- Algebra 2 - Find an equation of the ellipse satisfying the given conditions. ...
- Algebra - I need help filling in the blank and answering the question. 1. If you...
- Algebra 2 - I've got some homework about ellipses and I am not sure if I am ...
- Ellipses - Given an ellipse; 8x^2+y^2+80x-6y+193=0, find center, major axis, ...

More Related Questions