math
posted by Anonymous .
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
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
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.
Respond to this Question
Similar Questions

Algebra
I need help filling in the blank and answering the question. 1. If you move the two foci of an ellipse together so that they become a single point, then the ellipse will become a/an. 2. What happens when the major and minor axes … 
geometry
The area of an ellipse in the form (x*x/a*a)+(y*y)/(b*b)=1 is A=3.14*ab. For this ellipse, a+b=20. a. write the area of the ellipse as a function of a. b. Find the equation of the ellipse with an area of 264 square centimeters. c. … 
Algebra II
Could someone please check these. For ellipse: (x2)^2/49 + (y+1)^2/25 = 1 1.What is the major axis in equation form of this ellipse? 
maths
Given the equation of an ellipse is 4x^2 + y^2 + 24x  6y + 9 = 0 (i) Find the centre,foci and vertices (ii)calculate the lengths of the major and minor axes 
Algebra 2
Find an equation of the ellipse satisfying the given conditions. Center at (2,3) with major axis of length 8 and parallel to the y axis, minor axis of length 2. I don't understand how you get the formula for this. some help please 
trig/ellipse equation
Find an equation of an ellipse satisfying the given conditions: Vertices: (1, 8) and (1, 4); and the length of the minor axis is 10. 
Math
Find an equation in standard form for the ellipse that satisfies the given condition with major axis endpoints (1,4) and (1,8), minor axis length 8. 
math
An ellipse and a hyperbola have the same foci, $A$ and $B$, and intersect at four points. The ellipse has major axis 50, and minor axis 40. The hyperbola has conjugate axis of length 20. Let $P$ be a point on both the hyperbola and … 
algebra
Please help with this problem: An ellipse and a hyperbola have the same foci, $A$ and $B$, and intersect at four points. The ellipse has major axis 50, and minor axis 40. The hyperbola has conjugate axis of length 20. Let $P$ be a … 
Math
Write the equation of the ellipse using the given information: The axis has lengths 2 and 5; the major axis is vertical; and the center of the ellipse is (–1, –2).