What is Inradius?

Perpendicular distance between incentre and and any of the vertex of the triangle

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Perpendicular distance between the incentre and any of the side of the triangle

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Half of the length of shortest side of the triangle

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Half of the length of longest side of the triangle

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Solution

The correct option is B
Perpendicular distance between the incentre and any of the side of the triangle

Inradius is the radius of incircle which is the perpendicular distance between the incentre and any of the side of the triangle.

In the figure, O is the incentre and OD $=$ OE $=$ OF $=$ inradius.

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