# SOLUTION: 1)If the sum of the areas of two circles with radii r1 and r2 is equal to the area of a circle of radius r, then a) r1 +r2 = r b) r1^2 +r2^2 = r^2 c) r1 +r2 < r d) r1

Algebra ->  Algebra  -> Circles -> SOLUTION: 1)If the sum of the areas of two circles with radii r1 and r2 is equal to the area of a circle of radius r, then a) r1 +r2 = r b) r1^2 +r2^2 = r^2 c) r1 +r2 < r d) r1      Log On

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 Geometry: Circles and their properties Solvers Lessons Answers archive Quiz In Depth

 Question 237227: 1)If the sum of the areas of two circles with radii r1 and r2 is equal to the area of a circle of radius r, then a) r1 +r2 = r b) r1^2 +r2^2 = r^2 c) r1 +r2 < r d) r1^2 +r2^2< r^2 2) 2) If the sum of the circumferences of two circles with radii R1 and R2 is equal to the circumference of a circle of radius R, then (A) R1 + R2 = R (B) R1 + R2 > R (C) R1 + R2 < R (D) Nothing definite can be said about the relation among R1, R2 and RAnswer by edjones(7569)   (Show Source): You can put this solution on YOUR website!Let pi= the constant c Let r1=rx, r2=ry and r=rz (less confusion for me) 1) c*r^2=A Ax+Ay=Az cx^2+cy^2=cz^2 b) x^2+y^2=z^2 divide each side by c . 2) 2cr=C 2cx+2cy = 2cz a) x+y=z divide each side by 2c. . Ed