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If circle A has a radius of 3 cm and circle B has a radius of 4 cm and circle C has the same total area as circles A and B combined hoe do you determine the radius of circle C?
Wiki User
∙ 14y ago
The formual for area is: A = πr2 so the area of circle A (assuming π=3.142) is 28.278cm2, and the area of circle B is 50.272cm2.
Their combined area of 78.55cm2 is the area of circle C.
The formula for radius is: square root of A/π
78.55 ÷ 3.142 = 25, the square root of 25 is 5
The radius of circle C is 5cm
Area of Circle A = π32 = 9π
Area of Circle B = π42 = 16π
Area of Circle C = 9π + 16π = 25π
Let r = radius of Circle C then
πr2 = 25π : r2 = 25 : r = 5.
Wiki User
∙ 14y ago
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A point. To learn why and more about circles go to this website: windowseat.ca/circles
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Is concentric circle and congruent circle are they same?
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How do you determine the length of the radius on a circle?
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What undefined term is needed to define a circle?
A point. To learn why and more about circles go to this website: windowseat.ca/circles
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nothing you will just just get the radius in 3 circles.
Can a circle be drawn with any center and any radius?
The center of a circle is the same for all circles but the length of the radius can change
Do concentric circles have the same circles?
No. You can only define a circle by radius, diameter, area, perimeter. Concentric circles have the same centre, therefore, if they were the same circles with the same radius, then they would all lie on top of each other and be effectively one circle.
Is concentric circle and congruent circle are they same?
No. Concentric circles have the same centre but not [usually] the same radius. Congruent circles have the same radius, but not [usually] the same centre. If you have two concentric congruent circles one will be exactly on top of the other.
How do you determine the length of the radius on a circle?
The radius of a circle is defined as the distance from the centre-point to the circumference.
What fraction of the area of a circle of radius 5 lies between concentric circles of radius 3 and 4?
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Is the ratio of the radius to the diameter of all circles?
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A large circle has a radius of 10cm Given four congruent circles tangent to one another within the large circle what is the radius of the largest circle which will fit in the middle?
Letting x be radius of the 4 circles, then (squareroot(2x^2))+x=10, or x(1+sqrt2)=10. Then radius of circle in middle is ((2*10)-4x)/2. So I get radius of circle in middle = 1.715729 approximately.
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It's not a circle if it's radius of 5 degrees. If it's 5 cm radius, then 12 circles.
