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Mathematics 26 Online
OpenStudy (sleepyjess):

Can someone help me find the equation of an ellipse? Measurements and picture below

OpenStudy (amistre64):

what do you know about the general setup?

OpenStudy (sleepyjess):

I am just completely clueless with ellipses

OpenStudy (amistre64):

youll need to at least know the general setup for an ellipse ... it should be in your material or online search

OpenStudy (amistre64):

and the picture we can cull the information to fill it in with

OpenStudy (sleepyjess):

This is the ellipse I found, I used the one going up and down http://prntscr.com/6nikzx

OpenStudy (sleepyjess):

and the measurements I got 3 7/8 inches top to bottom, and 1 1/2 inches side to side

OpenStudy (amistre64):

lol, you sure this isnt an advertisement for ... what is that a saturn?

OpenStudy (sleepyjess):

lol

OpenStudy (sleepyjess):

I had to find an ellipse in real life and remembered my dad's truck haha

OpenStudy (amistre64):

we are going to center this at the origin to make the general formula simpler to build

OpenStudy (amistre64):

|dw:1427762369382:dw|

OpenStudy (sleepyjess):

Okay, I found the equation, \(\dfrac{(x-h)^2}{b^2}+\dfrac{(y-k)^2}{a^2}=1\)

OpenStudy (amistre64):

a^2 under x and b^2 under y a relates to left right measures, b relates to the up down measures

OpenStudy (sleepyjess):

oh whoops

OpenStudy (sleepyjess):

and it is a Toyota :P

OpenStudy (amistre64):

h,k is the center point, we choose the origin 0,0 to make life pretty \[E_1:=~\frac{x^2}{a^2}+\frac{y^2}{b^2}=1\] and ive already shown how to determine a and b

OpenStudy (sleepyjess):

a would be .75 and b would be 1.9375

OpenStudy (amistre64):

2a = 1 1/2 inches side to side 2b = 3 7/8 inches top to bottom yeah, those sound fine to me

OpenStudy (sleepyjess):

You make this seem so simple...

OpenStudy (amistre64):

i know where the stepping stones are placed :)

OpenStudy (sleepyjess):

:)

OpenStudy (sleepyjess):

So the final equation would be \(\dfrac{x^2}{.5625} + \dfrac{y^2}{3.75390625}=1\)

OpenStudy (amistre64):

ill trust you squared a and b, and yeah, thats good

OpenStudy (sleepyjess):

yay! thanks :)

OpenStudy (amistre64):

might want to use the same nuber of decies to make it prettier but math dont care about that sort of stuff, only executives

OpenStudy (sleepyjess):

okay haha

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