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Two or more circles are concentric if they have same
  • a)
    centr
  • b)
    radil
  • c)
    diameter
  • d)
    none
Correct answer is option 'A'. Can you explain this answer?

Ref: https://edurev.in/question/552322/Two-or-more-circles-are-concentric-if-they-have-samea-centrb-radilc-diameterd-noneCorrect-answer-is-

Concentric circles are circleswith a common center. 
The following image is going to help you understand it better:

Image
This is a pair of concentric circles.
They will never have the same radii , if they have they will actually lie on each other.

This was a short note for understanding concentric circles.
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FAQs on Concentric circles - Class 9

1. What are concentric circles?
Ans. Concentric circles are a series of circles that have the same center point but different radii. These circles are formed by drawing multiple circles with a common center, where each circle has a larger radius than the previous one.
2. How are concentric circles used in geometry?
Ans. In geometry, concentric circles are often used to describe and analyze various geometric figures. They can be used to determine the distance between two points, find the common tangents between circles, or identify the intersection points of circles with other geometric shapes.
3. What is the significance of concentric circles in art?
Ans. Concentric circles have been widely used in art as a design element. Artists often incorporate concentric circles into their artwork to create a sense of depth, movement, or focus. These circles can represent different concepts such as energy, harmony, or the cyclical nature of life.
4. How can concentric circles be applied in real-life scenarios?
Ans. Concentric circles find applications in various real-life scenarios. They are used in architecture to design structures with circular or radial symmetry, such as domes or circular buildings. In urban planning, concentric circles can be used to design road networks or zoning plans. They are also used in radar and sonar systems to detect and locate objects.
5. Can concentric circles be found in nature?
Ans. Yes, concentric circles can be found in nature. Many natural phenomena exhibit concentric patterns, such as the rings on a tree trunk, the ripples formed when a stone is thrown into water, or the growth rings in shells. These patterns are a result of the way natural forces or growth processes act on the objects, creating concentric shapes.
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