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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 a 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.

Reference:

https://pixabay.com/photos/bullock-cart-cart-transport-3619974/

https://pixabay.com/photos/bicycle-gear-golden-hipster-chain-557046/