Gather like terms:x2 + y2 − 2x − 4y + 1 + 4 − 9 = 0 And we end up with this:x2 + y2 − 2x − 4y − 4 = 0It is a circle equation, but "in disguise"!So when you see something like that think "hmm ... that might be a circle!"In...
Circle is the set of points in a plane that are equidistant from a given point. Learn more about circle, tangent equation, chord etc. with the help of solved examples.
The equation for a circle Unit Circle The equation of a unit circle - where the center of the circle is located in the origo of the coordinate system and theradius = 1- can be expressed as x2+ y2= 1 (1) Standard Form The standard form for the equation of a circle can be expresse...
百度试题 结果1 题目A circle has equation x^2+y^2=8Find the area of the circle. 相关知识点: 试题来源: 解析 8π 反馈 收藏
圆C的方程为x2+y2−12x−34y+225=0.将C的圆心记为R. (1) Write down the coordinates of R. 写出R的坐标. (2) The equation of the straight line L is 4x+3y+50=0. It is found that C and L do not intersect. Let P be a point lying on L such that P is nearest to R. 直...
2-8x+cy=33,wherecis a positive constant. The lineLwith equationy=2x-12,intersects the circle at the point(9,k),wherekis a constant. (a)Find the values ofcandk. [2] 11 (b)Find the perpendicular d...
Equation of a circle that cuts the circle x^2 + y^2 + 2gx + 2fy + c = 0, lines x=g and y=f orthogonally is : (A) x^2 + y^2 - 2gx - 2fy - c = 0 (B) x^2 + y^2 -
Hi大家好我是赤蛇,这期介绍一下dse数学中equation of circles的知识点。这期不出完,如果点赞多的话会出下一期。 Forms Standard Form (Center-radius Form) 圆心:C(h, k) 半径:r Standard Form: (x-h)2+(y-k)2=r2. General Form 圆心:(h, k)=(-D/2, -E/2) ...
百度试题 结果1 题目A circle nasequationx^2+y^2=64Find the circumference of the circle 相关知识点: 试题来源: 解析 16π 反馈 收藏
10 A circle has the equation x^2+y^2+6x-4y-12=0(i) Find the coordinates of the centre of the circle and the radius of the circle.[3](ii) Show that the equation of the tangent to the circle at the point P(-7,-1) is 3y+4x+31=0.[3]The point Q, which lies on the...