Guest Posted September 29, 2008 Report Share Posted September 29, 2008 A circle of a radius 15cm intersects another circle of radius 20 cm at right angles. What is the difference of the areas of the non-overlapping portion? What is the sum of the areas of the non-overlapping portion? Quote Link to comment Share on other sites More sharing options...
0 Guest Posted September 29, 2008 Report Share Posted September 29, 2008 Difference of non-overlapping areas= 272.649 - 135.204 = 137.445 cm^2 Sum of non-overlapping areas = 272.649 + 135.204 = 407.853 cm^2 Quote Link to comment Share on other sites More sharing options...
0 bonanova Posted September 30, 2008 Report Share Posted September 30, 2008 Difference of non-overlapping areas= 272.649 - 135.204 = 137.445 cm^2 Sum of non-overlapping areas = 272.649 + 135.204 = 407.853 cm^2 Those numbers seem small. Compare with 3/4 of the individual areas. Quote Link to comment Share on other sites More sharing options...
0 bonanova Posted September 30, 2008 Report Share Posted September 30, 2008 A circle of a radius 15cm intersects another circle of radius 20 cm at right angles. What is the difference of the areas of the non-overlapping portion? What is the sum of the areas of the non-overlapping portion? Circles intersect at two points. Are you saying both intersections are at right angles, or can one intersection be something else? Quote Link to comment Share on other sites More sharing options...
0 Guest Posted September 30, 2008 Report Share Posted September 30, 2008 Sorry for sounding dumb, but how do 2 circles intersect at right angles? could you provide an image? Quote Link to comment Share on other sites More sharing options...
0 Guest Posted September 30, 2008 Report Share Posted September 30, 2008 Sorry for sounding dumb, but how do 2 circles intersect at right angles? could you provide an image? Two circles intersect at right angles when the distance between their centers is equal to the square root of the sum of the squares of their respective radii. There was another thread where we discussed this http://brainden.com/forum/index.php?showto...ost&p=70759 Quote Link to comment Share on other sites More sharing options...
0 Guest Posted September 30, 2008 Report Share Posted September 30, 2008 Try No.2 1090.595-540.816= 549.779 1631.595+540.816 = 1631.411 Quote Link to comment Share on other sites More sharing options...
0 Guest Posted October 1, 2008 Report Share Posted October 1, 2008 Two circles intersect at right angles when the distance between their centers is equal to the square root of the sum of the squares of their respective radii. There was another thread where we discussed this http://brainden.com/forum/index.php?showto...ost&p=70759 Thanks Chuck. My Something New for the day! Quote Link to comment Share on other sites More sharing options...
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A circle of a radius 15cm intersects another circle of radius 20 cm at right angles.
What is the difference of the areas of the non-overlapping portion?
What is the sum of the areas of the non-overlapping portion?
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