In this lesson our instructor talks about tangents. First, she discuses tangent theorems and common tangents. Then she talks about tangent segment and circumscribed polygons. Four extra example videos round up this lesson.
If a line is a tangent to a
circle, then it is perpendicular to the radius drawn to the point
In a plane, if a line is
perpendicular to a radius of a circle at the endpoint on the
circle, then the line is a tangent of the circle
Know what common external tangents and common internal tangents are using geometric pictures
Tangent segments: If two segments from the same exterior point are tangent to a circle, then they are congruent
Circumscribed Polygons: A polygon is circumscribed about a circle if each side of the polygon is tangent to the circle
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.