Question
If a circle whose centre is (2, 3) touches the line 4x +
3y − 7 = 0, then the radius of the circle is:Solution
Given: Centre of the circle = (2,3) Equation of the line = 4x+3y−7=0 Formula for distance from a point to a line: 
Substitute values: 
Hence, the radius of the circle is 2.
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