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It is pi*(92 - 52) = pi*(81 - 25) = pi*56 = 175.93 cm2

Q: What is the area between two circles with the same centre and of radii 5cm and 9cm respectively?

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Concentric circles are circles with the same common centre.

Yes

concentric circles

Circles that have congruent radii. Congruent=coinciding at all points when superimposed (http://dictionary.reference.com/browse/congruent)

A quarter of a circle, formed by two radii forming a right angle at the centre, is called a quadrant.

Related questions

Concentric circles are circles with the same common centre.

Their circumferences are in direct proportion to their radii. Their areas are in direct proportion to the square of their radii.

Congruent circles

Tangent circles are circles that touch one another without crossing. The distance between the centres of the circles must be equal to the difference or the sum of their radii.

A radii is just a plural form of radius. A circle doesnt have one radius. The term radii is mostly used when talking about multiple circles.

They are congruent or identical circles

Are congruent circles.

They are congruent circles

Congruent circles

Yes

The area of a circle is directly proportional to the square of its radius. If two circles have radii R1 and R2 , then the ratio of their areas is ( R1/R2 )2

concentric circles