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Geometry
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Total Videos :113
Euclid as the Father of Geometry
00:08:23
Language and Notation of Basic Geometry
00:12:58
Lines, Line Segments, and Rays
00:03:38
Language and Notation of the Circle
00:11:12
Angle Basics
00:06:49
Measuring Angles in Degrees
00:08:22
Using a Protractor
00:03:25
Measuring Angles
00:04:05
Complementary and Supplementary Angles
00:08:31
Angles at the intersection of two lines
00:07:19
Proof-Vertical Angles are Equal
00:04:51
Angles Formed by Parallel Lines and Transversals
00:07:07
Proof - Sum of Measures of Angles in a Triangle are 180
00:06:31
Triangle Angle Example 1
00:06:03
Triangle Angle Example 2
00:04:55
Triangle Angle Example 3
00:05:42
Challenging Triangle Angle Problem
00:08:37
Proof - Corresponding Angle Equivalence Implies Parallel Lines
00:05:18
Finding more angles
00:06:05
Sum of Interior Angles of a Polygon
00:09:10
Congruent Triangles and SSS
00:11:29
SSS to Show a Radius is Perpendicular to a Chord that it Bisects
00:08:19
Other Triangle Congruence Postulates
00:13:28
Two column proof showing segments are perpendicular
00:11:06
Sum of the exterior angles of convex polygon
00:05:24
Finding Congruent Triangles
00:07:28
More on why SSA is not a postulate
00:07:24
Congruent Triangle Proof Example
00:05:46
Congruent Triangle Example 2
00:12:14
Congruent legs and base angles of Isosceles Triangles
00:09:03
Equilateral Triangle Sides and Angles Congruent
00:06:29
Equilateral and Isosceles Example Problems
00:06:27
Another Isosceles Example Problem
00:05:34
Example involving an isosceles triangle and parallel lines
00:03:15
Figuring out all the angles for congruent triangles example
00:04:35
Perimeter and Area Basics
00:08:25
Triangle Area Proofs
00:10:23
Interesting Perimeter and Area Problems
00:08:13
Koch Snowflake Fractal
00:09:11
Area of an Equilateral Triangle
00:03:42
Area of Koch Snowflake (part 1) - Advanced
00:12:30
Area of Koch Snowflake (part 2) - Advanced
00:06:32
Challenging Perimeter Problem
00:09:56
Similar Triangle Basics
00:09:17
Similarity Postulates
00:12:14
Similar Triangle Example Problems
00:09:23
Similarity Example Problems
00:07:37
Challenging Similarity Problem
00:09:53
Similarity example where same side plays different roles
00:06:05
Finding Area Using Similarity and Congruence
00:10:07
Pythagorean Theorem Proof Using Similarity
00:09:52
30-60-90 Triangle Side Ratios Proof
00:06:59
45-45-90 Triangle Side Ratios
00:05:42
30-60-90 Triangle Example Problem
00:06:40
The Golden Ratio
00:14:42
Introduction to angles (old)
00:09:55
Angles (part 2)
00:09:04
Angles (part 3)
00:09:47
Angles formed between transversals and parallel lines
00:07:53
Angles of parallel lines 2
00:05:15
The Angle Game
00:09:01
Similar triangles
00:09:34
Similar triangles (part 2)
00:09:54
Angle Game (part 2)
00:09:49
Acute Right and Obtuse Angles
00:05:32
Area and Perimeter
00:12:20
Circles: Radius, Diameter and Circumference
00:11:05
Area of a circle
00:06:45
The Pythagorean Theorem
00:10:46
Pythagorean Theorem II
00:09:36
45-45-90 Triangles
00:09:30
Intro to 30-60-90 Triangles
00:09:39
30-60-90 Triangles II
00:04:49
Solid Geometry Volume
00:03:56
Cylinder Volume and Surface Area
00:08:07
Heron s Formula
00:04:43
Part 1 of Proof of Heron s Formula
00:10:59
Part 2 of the Proof of Heron s Formula
00:12:08
Inscribed and Central Angles
00:14:16
Area of Inscribed Equilateral Triangle (some basic trig used)
00:11:39
Right Triangles Inscribed in Circles (Proof)
00:05:35
Area of Diagonal Generated Triangles of Rectangle are Equal
00:04:36
Triangle Medians and Centroids
00:08:59
Triangle Medians and Centroids (2D Proof)
00:15:15
Rhombus Diagonals
00:04:38
2003 AIME II Problem 7
00:13:13
Perpendicular Radius Bisects Chord
00:06:57
Circumcenter of a Triangle
00:12:29
Circumcenter of a Right Triangle
00:05:42
Three Points Defining a Circle
00:10:08
Point Line Distance and Angle Bisectors
00:10:57
Incenter and incircles of a triangle
00:07:58
Angle Bisector Theorem Proof
00:08:35
Inradius Perimeter and Area
00:07:29
Angle Bisector Theorem Examples
00:03:04
Medians divide into smaller triangles of equal area
00:07:46
Exploring Medial Triangles
00:11:33
Proving that the Centroid is 2-3rds along the Median
00:06:56
Median Centroid Right Triangle Example
00:09:00
Proof - Triangle Altitudes are Concurrent (Orthocenter)
00:10:01
Review of Triangle Properties
00:09:57
Euler Line
00:06:12
Euler s Line Proof
00:09:50
Common Orthocenter and Centroid
00:06:25
Quadrilateral Overview
00:08:24
Proof - Opposite Sides of Parallelogram Congruent
00:08:30
Proof - Diagonals of a Parallelogram Bisect Each Other
00:09:06
Proof - Opposite Angles of Parallelogram Congruent
00:04:08
Proof - Rhombus Diagonals are Perpendicular Bisectors
00:04:04
Proof - Rhombus Area Half Product of Diagonal Length
00:05:07
Area of a Parallelogram
00:05:42
Problem involving angle derived from square and circle
00:08:15
Area of a Regular Hexagon
00:07:51
Geometry
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Total Videos :113
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First Video of Geometry
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Euclid as the Father of Geometry
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