Geometry Help

[DarkBlade2117]

So.. missing a day in Geometry or any math class is not fun. There are 3 types of problems on this paper that I either want help/answers to similar example problems to help me going. There are an extra 10 from the 3 I am asking, so not trying to get you to do my H.W.

 

1. Write an equation for the circle that satisfies each set of conditions.

center (-4,2), radius 8 units.

 

2. endpoints of a diameter at (-2, -9) and (0,-5)

 

and last one

Find the center of the radius of each circle. Then graph it. I can do the graphing part.

(x+3)^2 + y^2 = 16

 

Thank you.

 

[pinksnowmanshandle]

I tend to prefer to work with circles...

π and 360° and 180° are things that are used in circles...

 

 

 

So umm if a ♂ likes ♂s and that's okay. Just like I'm a ♂ and like ♂s... And if a ♀ likes ♀s that's cool too. If a ♂ likes ♀s that's cool too and if a ♀ likes ♂s that's also cool...

[DarkBlade2117]

14 minutes ago, wcreek said:

I tend to prefer to work with circles...

π and 360° and 180° are things that are used in circles...

 

 

 

So umm if a ♂ likes ♂s and that's okay. Just like I'm a ♂ and like ♂s... And if a ♀ likes ♀s that's cool too. If a ♂ likes ♀s that's cool too and if a ♀ likes ♂s that's also cool...

No idea what you are trying to say.

[No]

15 minutes ago, wcreek said:

I tend to prefer to work with circles...

π and 360° and 180° are things that are used in circles...

 

 

 

So umm if a ♂ likes ♂s and that's okay. Just like I'm a ♂ and like ♂s... And if a ♀ likes ♀s that's cool too. If a ♂ likes ♀s that's cool too and if a ♀ likes ♂s that's also cool...

lol wtf

[pinksnowmanshandle]

6 minutes ago, DarkBlade2117 said:

No idea what you are trying to say.

I don't know either... lol. I wanted to answer those questions but they're kinda awkward so I just wrote that... I think that's because you're graphing them on like a grid and like that kinda stuff was annoying but like almost anything else with circles, spheres and hemispheres is fine.

So for the first question, I think the center is probably either -4 or 2. If I recall correctly deciding where the center of the circle was up to your discretion.

5 minutes ago, No said:

lol wtf

Idk

[pinksnowmanshandle]

I hadn't known about those alt codes so I discovered those by accident so I decided to do something with them...

[xentropa]

Circle equation is 

(X-ox)^2+(Y-oy)^2=R^2

Where ox and oy is the coordinates of the middle of tge circle.

 

1.) Using the above equation and substituting -4 2 and a radius 8 we get,

(X+4)^2+(Y-2)^2=8^2

 

2.) Find the middle point between the end points of the diameter.  That is the middle of the circle.  Then find the radius.

 

3.) Use the equation in number 1