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11 votes
HELP PLEASE <3

What is the area of the circle with the equation 2x2 + 2y2 = 8?

show work pls !!

2 Answers

11 votes

Answer: 4π

Explanation:

Under the assumption that those are exponents, and your equation is:


2x^2+2y^2=8

You first must turn this circle equation into standard form. The standard form for the equation of a circle is as follows:


(x-a)^2+(y-b)^2=r^2

For your case, the constants 'a' and 'b' are clearly zero. We have an annoying coefficient of 2 which can be cancelled by dividing both sides by 2:


x^2+y^2=4

If you'd like, we can write this in the following way:


(x-0)^2+(y-0)^2=2^2

So, our circle is centered at the origin (0, 0) and has a radius of 2 units. The area of a circle is given by the formula:


A=\pi r^2


A=\pi (2^2)=4\pi

User Sandeep Bhandari
by
4.4k points
9 votes

Answer:

4pi

Explanation:

Divide through by two to get

x^2 + y^2 = 4 4 = radius squared radius = 2

area = pi r^2 = 4 pi

User Sunjay Varma
by
4.3k points