Given a circle: C(1,2) & radius sqrt(5)√5 a) Find the perpendicular distance from center to x + 2y -10=0x+2y−10=0, show this line is a tangent to the circle. b) Find the perpendicular distance from center to x+2y -12 =0x+2y−12=0, show the line does not meet circle?
1 Answer
Nov 14, 2016
The distance of C to the first line is exactly
Explanation:
The general formula for the distance of the generis point
so the distances are