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# Tangent Lines

## Lines perpendicular to the radius drawn to the point of tangency.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Tangent Lines

This concept teaches students about tangent lines and how to apply theorems related to tangents of circles.
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## SLT 3 Determine relationships between radii, chords, and tangents.

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• PLIX

## Tangent Lines

Tangent Lines Interactive
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## Tangent Lines

Tangent Lines Interactive
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• Video

## Tangent Lines Principles

This video gives more detail about the mathematical principles presented in Tangent Lines.
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## Tangent Lines Examples

This video shows how to work step-by-step through one or more of the examples in Tangent Lines.
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• Video

## SAT Math (Geometry) - Practice 3.7

Overview
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• Critical Thinking

## Tangent Lines Discussion Questions

A list of student-submitted discussion questions for Tangent Lines.
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• Real World Application

## Swing Rides

Learn how NASA uses tangent lines when launching space probes.
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• Study Guide