{"id":4008,"date":"2021-08-13T18:18:28","date_gmt":"2021-08-13T18:18:28","guid":{"rendered":"https:\/\/mathemerize.com\/?p=4008"},"modified":"2021-11-30T16:29:32","modified_gmt":"2021-11-30T10:59:32","slug":"formula-for-circumcenter-of-a-triangle","status":"publish","type":"post","link":"https:\/\/mathemerize.com\/formula-for-circumcenter-of-a-triangle\/","title":{"rendered":"Formula for Circumcenter of a Triangle | Incenter of Triangle"},"content":{"rendered":"
Here, you will learn formula for circumcenter of a triangle and formula for incenter of a triangle.<\/p>\n
Let’s begin –<\/p>\n
It is the point of intersection of perpendicular bisectors of the sides of a triangle. If O is the circumcenter of any triangle ABC, then \\(OA^2\\) = \\(OB^2\\) = \\(OC^2\\). Also it is the center of circle touching all the vertices of a triangle.<\/p>\n
Note :<\/strong><\/p>\n (i)\u00a0 If the triangle is right angled, then its circumcenter is the mid-point of the hypotenuse.<\/p>\n (iii)\u00a0 The Co-ordinates of circumcenter is :<\/p>\n Circumcenter = (\\(x_1sin2A+x_2sin2B+x_3sin2C\\over {sin2A+sin2B+sin2C}\\),\\(y_1sin2A+y_2sin2B+y_3sin2C\\over {sin2A+sin2B+sin2C}\\))<\/p>\n<\/blockquote>\n The incenter is the point of intersection of internal bisectors of the angles of a triangle. Also it is a centre of the circle touching all the sides of the triangle.<\/p>\n Co-ordinates of incenter I is (\\(ax_1+bx_2+cx_3\\over {a+b+c}\\),\\(ay_1+by_2+cy_3\\over {a+b+c}\\)) where a,b,c are the sides of the triangle ABC.<\/p>\n<\/blockquote>\n Note :<\/strong><\/p>\n (i)\u00a0 Angle bisector divides the opposite sides in the ratio of remaining sides e.g. \\(BD\\over DC\\) = \\(AB\\over AC\\) = \\(c\\over b\\)<\/p>\n (ii)\u00a0 Incenter divides the angle bisectors in the ratio (b+c) : a, (c+a) : b, (a+b) : c.<\/p>\n Remarks :<\/strong><\/p>\n (i)\u00a0 If the triangle is equilateral, then centroid, incentre, orthocenter, circumcenter coincide.<\/p>\n (ii)\u00a0 Orthocenter, centroid and circumcenter are always collinear and centroid divides the line joining orthocenter and circumcenter in the ratio 2 : 1.<\/p>\n (iii)\u00a0 In an isosceles triangle centroid, incenter, orthocenter and circumcenter lie on the same line.<\/p>\n Hope you learnt formula for circumcenter of a triangle and formula for incenter of a triangle. To learn more practice more question and get ahead in competition. Good Luck!<\/p>\n\n\n\n
Incenter of a Triangle<\/h2>\n
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