Tangents and Circles - YourTeacher.com - Geometry Help

For a complete lesson on tangents and circles, go to http://www.yourteacher.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn the following theorems related to tangents. If a line is tangent to a circle, then the line is perpendicular to the radius at the point of tangency. If a line is perpendicular to a radius at its outer endpoint, then the line is tangent to the circle. If two tangent segments are drawn to a circle from an external point, then the tangent segments are congruent. Students are then asked to use these theorems to find missing segment lengths and missing angle measures in given figures. Students also learn the definitions of common internal tangents and common external tangents.

Category:

Education

Tags:

• tangent
• tangents
• line
• circle
• circles
• lines
• segment
• segments

[OfficialAla]

DEAR ALL SCHOOL PRINCIPLES, PLEASE FIRE EVERY SINGLE TEACHER AT SCHOOL! & Hire Youtube and Google. (; I think all us students can agree we learn MORE FROM THEM than we do from the teachers at school that can barely teach. Isn't is sad enough that we have to go ONLINE to find help instead of the place we get our education from? YOUTUBE AND GOOGLE teach me more than school does! Sincerely, pissed off students.

[amandasnaplife]

Awkward stare: 0:16 - 0:20. lol

[HeyItsEstefania]

@spid3rB4t agreed.

[TheBYTproductions]

I really ought to pay attenion more in class, or else I would not be here....



[imalreadyhigh]

are we on.... are we on?

[spid3rB4t]

@OfficialAla

Don't mean to be disrespectful but she's a teacher too. If you're saying you should fire every teacher just cos you don't learn from yours, then you're being a little bit ridiculous. The place where /you/ get your education from may be terrible, but that doesn't mean everyone else's is. Perhaps you should think before you start ranting?

[11warrior2014]

@OfficialAla i agree. i have learned more here then in class

[SomeLinuxUser]

Its neat that I can learn more effectively from a 3 minute video than from an entire chapter in my book.

[IrishSMM2394]

i learn more from mathxl than my teacher

[MissJJacks]

These comments make me feel like i'm actually in class haha

but she does stare at the screen awkwardly... o__O

[XBlackShadowX94]

wtf! is she's robot or something?

[PlayfulWolfPup]

I'm here because I'm amazed by her handwriting.