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Tangent:
If a line touches the given circle at only one point, then it is called a tangent to the circle.
Real-life examples of circles and tangents:
- When a bullock cart moves along a road, then the road becomes the tangent at each point when the wheels roll on it.
- When the wheels of a cycle rotate, the chain becomes the tangent at each point of the gear of a bicycle.
- When a coin is placed over a ruler, the ruler acts as a tangent to the coin at each point when it is rolled over it.
Important!
The common point where the circle and the tangent intersects is called the point of contact.
Reference:
https://pixabay.com/photos/bullock-cart-cart-transport-3619974/
https://pixabay.com/photos/bicycle-gear-golden-hipster-chain-557046/