20. khanacademy : Sum of Interior Angles of a Polygon
19. khanacademy : Finding more angles
Example of angle hunting!
18. khanacademy : Proof - Corresponding Angle Equivalence Implies Parallel Lines
17. khanacademy : Challenging Triangle Angle Problem
Interesting problem finding the sums of particular exterior angles of an irregular pentagon
16. khanacademy : Triangle Angle Example 3
15. khanacademy : Triangle Angle Example 2
14. khanacademy : Triangle Angle Example 1
Figuring out angles in a triangle. A little about exterior angles being the sum of the remote interior angles
13. khanacademy : Proof - Sum of Measures of Angles in a Triangle are 180
12. khanacademy : Angles Formed by Parallel Lines and Transversals
Parallel lines, transversal lines, corresponding angles
11. khanacademy:Proof-Vertical Angles are Equal
10. khanacademy:Angles at the intersection of two lines
9 . khanacademy:Complementary and Supplementary Angles
Basics of complementary, supplementary, adjacent and straight angles. Also touching on what it means to be perpendicular
8. khanacademy:Measuring Angles
Using the KA virtual protractor to measure angles
7. khanacademy:Using a Protractor
6. khanacademy:Measuring Angles in Degrees
5. khanacademy:Angle Basics
Definition of an angle. How to denote an angle using points on the angle (including the vertex)
4. khanacademy:Language and Notation of the Circle
Formal definition of a circle. Tangent and secant lines. Diameters and radii. major and minor arcs
3. khanacademy:Lines, Line Segments, and Rays
Difference between lines, line segments, and rays
1. khanacademy:Language and Notation of Basic Geometry
Understanding basic ideas in geometry and how we represent them with symbols
1. khanacademy:Euclid as the Father of Geometry