Circles, IV
Circles, IVTangentsDefinition - TangentsRay BC is tangent to circle A, because the line containing BC intersects the circle in exactly one point. This point is called the point of tangency.
TheoremIf a line is tangent to a circle, then it is perpendicular to the radius drawn to the point of tangency.
Example 1 Tangent Lines
Example 1 Tangent Lines
Example 1 Tangent Lines
Example 1 Tangent Lines
Example 1 Tangent Lines
Example 1 Tangent Lines
Example 2 Tangent Lines
Example 2 Tangent Lines
Example 2 Tangent Lines
Example 2 Tangent Lines
Example 2 Tangent Lines
Example 2 Tangent Lines
Example 2 Tangent Lines
Example 2 Tangent Lines
Theorem The converse is also trueIf a line is perpendicular to a radius of a circle at its endpoint on the circle, then the line is tangent to the circle.
Example 3 Showing Tangency
Example 3 Showing Tangency
Example 3 Showing Tangency
Example 3 Showing Tangency
Example 3 Showing Tangency
Example 3 Showing Tangency
Example 3 Showing Tangency
Example 4 Non Tangent Segment
Example 4 Non Tangent Segment
Example 4 Non Tangent Segment
Example 4 Non Tangent Segment
Example 4 Non Tangent Segment
Example 4 Non Tangent Segment
Example 4 Non Tangent Segment
Example 4 Non Tangent Segment
Example 4 Non Tangent Segment
Example 4 Non Tangent Segment
Example 4 Non Tangent Segment
Example 5Determine if the segments are tangent to the respective circles
CWTangent Lines of CirclesTheoremIf two segments from the same exterior point are tangent to a circle, then they are congruent.
Example 1
Example 1
Example 1
Example 1
Example 1
Example 1
Example 1
Example 1
Example 1
Example 1
Example 2 Circumscribed Triangles & Perimeter
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