29)find the centroid of the circle whose vertices are (4,-8),(-9,7),(8,13).
 
30)if the area of triangle PQR,where P(2,1),Q(x,1) and R(2,y) is 6 sq units ,then find the relationship between x and y.
 
31)the centre of a circle is (x+2,x-1) .Find x if the circle passes through (2,-2) and(8,-2).
 
32)if P(9a-2,-b) divides the line segment joining A(3a+1,-3) and B(8a,5) in the ratio 3:1 . Find the value of a and b.

Asked by snisarulhaq | 2nd Dec, 2017, 03:15: PM

Expert Answer:

begin mathsize 16px style Centroid space is space given space by space formulae
straight G equals open parentheses fraction numerator straight x subscript 1 plus straight x subscript 2 plus straight x subscript 3 over denominator 3 end fraction comma fraction numerator straight y subscript 1 plus straight y subscript 2 plus straight y subscript 3 over denominator 3 end fraction comma fraction numerator straight z subscript 1 plus straight z subscript 2 plus straight z subscript 3 over denominator 3 end fraction close parentheses
put space values space and space find space the space equation

NOTE colon space post space questions space one space by space one end style

Answered by Arun | 2nd Dec, 2017, 07:27: PM