Condition for a Point to Lie Inside a Circle

Rarely Tested

Condition for a Point to Lie Inside a Circle

For circle with centre $$(h,k)$$ and radius $$r$$, point $$(x_1,y_1)$$ lies inside if:

$$(x_1-h)^2+(y_1-k)^2<r^2$$

Usage

- Used to determine whether a point lies strictly inside a circle.

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