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If the sum of circumferences

The radius,diameter, or circumferences of a circle is given. Find the missing measures.D=2a,r=___,C=___. For the radius I got 1a
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2. asked by Shadow
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a circular plate has radius 15cm. every dimension is multiplied by 4 to create a larger, similar plate. how is the ratio of the
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2. asked by miah
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a gear on a bicycle has the shape of a circle one gear has a diameter of 4 inches and a small one has a diameter of 2 inches
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2. asked by Alberto
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Circumferences and area of circles practice
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The sum of the circumferences of two circles is 42 pie cm and the sum of their areas is 225 pie cm^2. Find the radius of each
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2. asked by Raman
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The relationship between circumferences and area practice seventh grade
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What is the circumference of a circle with a diameter of 8 kilometers? Estimate the circumferences to the hundredths place using
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2. asked by Need Help!
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If the sum of circumferences of two circles wirh radii r1 & r2 is equal to the circumference of a circle of radius r, then what
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2. asked by Sanjay
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Mothers who abuse cocaine during pregnancy are often ________.A. Prematurely delivered B. Have low birth weights C. Smaller head
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2. asked by Ole Girl
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Two circles have circumferences of π and 3π. What is the ratioof the area of the circles? the diameters? the radii?
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2. asked by Nikki
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