Using the Tangent-Chord Theorem, it is simple to prove the third theorem which provides a relationship between lines in circles - the Tangent-Secant Theorem (the other two being the Intersecting … [Read more...] about Tangent-Secant Theorem
A straight line outside a circle which just "touches" the circle, and intersects it at exactly one point, is called a tangent line.
The tangent line is perpendicular to the radius at the point where it intersects the circle.
Now that we've explained the basic concept of tangent lines in geometry, let's scroll down to work on specific geometry problems relating to this topic.
Today we'll find the angles of a triangle formed by two tangent lines to a circle using inscribed angles, and theorems about the sum of angles in a polygon. In this geometry problem, we will … [Read more...] about Tangents to a circle and inscribed angles
A line tangent to a circle is a line from a point outside the circle that touches the circle at exactly one point. At that point, the tangent line is perpendicular to the circle's radius and diameter, … [Read more...] about Tangent Line to a Circle
The two tangent theorem states that if we draw two lines from the same point which lies outside a circle, such that both lines are tangent to the circle, then their lengths are the same. We will now … [Read more...] about The Two Tangent Theorem