xLeeChaex 46 Posted September 6, 2014 Share Posted September 6, 2014 This is a topic about circles and for this question it says Find the standard form of the equation of each circle 35.Center at the origin and containing the point (-2,3) This is the standard form of an equation of a circle with radius r and center (h,k) is ( x-h )^2 + ( y-k )^2 = r^2 Well it says here that the standard form of an equation of a circle of radius r with center at the origin ( 0,0 ) is x^2 + y^2 = r^2 but can any of u guys can help me with this problem? Like explain it to me step by step lol Link to comment Share on other sites More sharing options...
ohmygosh 384 Posted September 6, 2014 Share Posted September 6, 2014 if the origin is (0,0), then it would be x-0 and y-0. that's why it's x^2 and y^2 Link to comment Share on other sites More sharing options...
Be natural 188 Posted September 6, 2014 Share Posted September 6, 2014 School starts 2moro. Why why this thread. Link to comment Share on other sites More sharing options...
Chaegzbb 11,237 Posted September 6, 2014 Share Posted September 6, 2014 Do you need to find r? Link to comment Share on other sites More sharing options...
Tee 9,628 Posted September 6, 2014 Share Posted September 6, 2014 I remember doing this in high school. Link to comment Share on other sites More sharing options...
xLeeChaex 46 Posted September 6, 2014 Author Share Posted September 6, 2014 if the origin is (0,0), then it would be x-0 and y-0. that's why it's x^2 and y^2 well when i look in the back of the book it says x^2 + y^2 =13 which is the answer to this question but i wonder how it got 13??? Link to comment Share on other sites More sharing options...
xLeeChaex 46 Posted September 6, 2014 Author Share Posted September 6, 2014 School starts 2moro. Why why this thread. Tell me about it :( I already started college and im dreading about it Link to comment Share on other sites More sharing options...
Be natural 188 Posted September 6, 2014 Share Posted September 6, 2014 Tell me about it :( I already started college and im dreading about it Good luck. Link to comment Share on other sites More sharing options...
Chaegzbb 11,237 Posted September 6, 2014 Share Posted September 6, 2014 well when i look in the back of the book it says x^2 + y^2 =13 which is the answer to this question but i wonder how it got 13??? I got it! Link to comment Share on other sites More sharing options...
Tee 9,628 Posted September 6, 2014 Share Posted September 6, 2014 well when i look in the back of the book it says x^2 + y^2 =13 which is the answer to this question but i wonder how it got 13??? pythagorean theorem? Link to comment Share on other sites More sharing options...
27lines 781 Posted September 6, 2014 Share Posted September 6, 2014 As you wrote, the only thing remaining is to determine r. The equation x^2 + y^2 = r^2 cuts out the points that are at distance r from (0, 0). Knowing that (x, y) = (-2, 3) is one of those points should give you an equation that, together with knowing that r is positive, should determine r. Does that help? Link to comment Share on other sites More sharing options...
Chaegzbb 11,237 Posted September 6, 2014 Share Posted September 6, 2014 This is a topic about circles and for this question it says Find the standard form of the equation of each circle 35.Center at the origin and containing the point (-2,3) This is the standard form of an equation of a circle with radius r and center (h,k) is ( x-h )^2 + ( y-k )^2 = r^2 Well it says here that the standard form of an equation of a circle of radius r with center at the origin ( 0,0 ) is x^2 + y^2 = r^2 but can any of u guys can help me with this problem? Like explain it to me step by step lol Link to comment Share on other sites More sharing options...
xLeeChaex 46 Posted September 6, 2014 Author Share Posted September 6, 2014 OMG U GOT IT!!!!!!!!!!!!! THANK U SO MUCH!! D: Link to comment Share on other sites More sharing options...
27lines 781 Posted September 6, 2014 Share Posted September 6, 2014 To the OP: a good place for questions like this is Math SE. I wish my students were this neat! Link to comment Share on other sites More sharing options...
xLeeChaex 46 Posted September 6, 2014 Author Share Posted September 6, 2014 It was so simple yet i didnt get that answer......... Link to comment Share on other sites More sharing options...
xxxnamie 897 Posted September 6, 2014 Share Posted September 6, 2014 I worked it out and this is what I got,too. College for me started 2 weeks ago and I'm already stressing over it. I'm already thinking of next semester and how screwed I'm going to be Link to comment Share on other sites More sharing options...
Chaegzbb 11,237 Posted September 6, 2014 Share Posted September 6, 2014 OMG U GOT IT!!!!!!!!!!!!! THANK U SO MUCH!! D: Yes I got it And this is a high school question not a college one... I remember doing this last year(in my 3rd year of high school). To the OP: a good place for questions like this is Math SE. I wish my students were this neat! Thanks! Are you a teacher? Link to comment Share on other sites More sharing options...
Chaegzbb 11,237 Posted September 6, 2014 Share Posted September 6, 2014 I worked it out and this is what I got,too. College for me started 2 weeks ago and I'm already stressing over it. I'm already thinking of next semester and how screwed I'm going to be I'm starting my last year of high school in one week too... I'm also stressing over my baccalaureate exams. Link to comment Share on other sites More sharing options...
xLeeChaex 46 Posted September 6, 2014 Author Share Posted September 6, 2014 Yes I got it And this is a high school question not a college one... I remember doing this last year(in my 3rd year of high school). Thanks! Are you a teacher? LOL i am in college and this class im taking is college algebra i was never taught this back in high school tbh...... Link to comment Share on other sites More sharing options...
Chaegzbb 11,237 Posted September 6, 2014 Share Posted September 6, 2014 LOL i am in college and this class im taking is college algebra i was never taught this back in high school tbh...... Woah really? I guess the math you learned in high school is way easier than the math I do in high school. Well if you have more math questions you can always ask me. I would be glab to help if I can. Link to comment Share on other sites More sharing options...
ArseneLupin 4,475 Posted September 6, 2014 Share Posted September 6, 2014 why am i learning the same shit as you but im in highschool, i always knew something was off about the education system here Link to comment Share on other sites More sharing options...
xLeeChaex 46 Posted September 6, 2014 Author Share Posted September 6, 2014 Woah really? I guess the math you learned in high school is way easier than the math I do in high school. Well if you have more math questions you can always ask me. I would be glab to help if I can. Damn i feel behind then D: i only took algebra, geometry, and algebra 2 and pre calculus in high school D: but i will ask questions if i need help :D But is it ok if u can me with another question though?? I got the answer but not sure how it makes sense tbh since i looked at it from the answer key at the back of the book lol Link to comment Share on other sites More sharing options...
Bang 5,318 Posted September 6, 2014 Share Posted September 6, 2014 what's dat? the Davinci code? Link to comment Share on other sites More sharing options...
Chaegzbb 11,237 Posted September 6, 2014 Share Posted September 6, 2014 Damn i feel behind then D: i only took algebra, geometry, and algebra 2 and pre calculus in high school D: but i will ask questions if i need help :D But is it ok if u can me with another question though?? I got the answer but not sure how it makes sense tbh since i looked at it from the answer key at the back of the book lol If I know how to solve it of course I'll help you. what's dat? the Davinci code? Link to comment Share on other sites More sharing options...
xLeeChaex 46 Posted September 6, 2014 Author Share Posted September 6, 2014 what's dat? the Davinci code? LOL ur gonna be learning that in college lolol If I know how to solve it of course I'll help you. Is it ok if i PM u instead?? lol Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.