The point (-1,0) lies on the circle x2+y2-4x+8y+k=0 . Find the radius of the circle.

Trigonometry (MindTap Course List)
8th Edition
ISBN:9781305652224
Author:Charles P. McKeague, Mark D. Turner
Publisher:Charles P. McKeague, Mark D. Turner
Chapter1: The Six Trigonometric Functions
Section1.2: The Rectangular Coordinate System
Problem 60PS
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The point (-1,0) lies on the circle x2+y2-4x+8y+k=0 . Find the radius of the circle.

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