Question
What is the radius when the center is (-5, 8) and the point on the circle is (2, 10)?
Hint:
The radius of circle is the distance between center of circle and any point on the circle. Using distance between two points formula find radius.
The correct answer is:
If a circle has radius as r and center as (-5, 8) and (2, 10) is a point on the circle. The distance between (2, 10) and (-5, 8) is r.
If there are two points 
and 
,then distance between two points is
Therefore, 
is the radius when the center is (-5, 8) and the point on the circle is (2, 10).
and ,then distance between two points is Therefore,
is the radius when the center is (-5, 8) and the point on the circle is (2, 10).Related Questions to study
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