Tangent circles are coplanar circles that intersect in exactly one point. They can be externally tangent or internally tangent.
Internally tangent circles
Internally tangent circles have one circle inside the other. In the image below, both circles share point B as a common point. Therefore, B is the point of tangency.
Line AC is called common tangent because line AC is tangent to both the small circle and the big circle.
Externally tangent circles
Externally tangent circles are outside of one another. In the image below, both circles share point Y as a common point. Therefore, Y is the point of tangency.
Line XZ is called common tangent because line XZ is tangent to both circles.
Feb 20, 19 12:46 PM
In number theory, a deficient number is a number where the sum of its ..
Basic math formulas
Algebra word problems
New math lessons
Your email is safe with us. We will only use it to inform you about new math lessons.
Recommended
Scientific Notation Quiz
Graphing Slope Quiz
Adding and Subtracting Matrices Quiz
Factoring Trinomials Quiz
Solving Absolute Value Equations Quiz
Order of Operations Quiz
Types of angles quiz
Feb 20, 19 12:46 PM
In number theory, a deficient number is a number where the sum of its ..