Mathematics
No. of
Lectures
Duration
(hrs:min)
High School Level
Basic Math
Mary Pyo, M.A.
80
35:18
Pre Algebra
Nancy Fung, M.Ed.
62
19:30
Algebra I
Eric Smith
61
18:58
Algebra I
Dr. Carleen Eaton, M.D.
63
22:45
Algebra II
Dr. Carleen Eaton, M.D.
72
34:11
Geometry
Mary Pyo, M.A.
89
58:08
Trigonometry
Dr. William Murray, Ph.D.
23
15:23
Precalculus
Prof. Vincent Selhorst-Jones
89
58:54
Math Analysis
Prof. Vincent Selhorst-Jones
89
58:54
AP Calculus AB
Prof. Raffi Hovasapian
66
44:00
AP Calculus BC
Prof. John Zhu, M.B.A.
33
8:39
AP Statistics
Prof. Sandahl Nelson
18
15:04
No. of
Lectures
Duration
(hrs:min)
College / University Level
Gen. Statistics
Dr. Ji Son, Ph.D.
49
36:33
Gen. Statistics
Dr. Philip Yates, Ph.D.
44
16:23
Probability
Dr. William Murray, Ph.D.
35
30:47
College Calculus: Level I
Dr. Jenny Switkes, Ph.D.
39
15:13
College Calculus: Level II
Dr. William Murray, Ph.D.
23
12:09
Multivariable Calculus
Prof. Raffi Hovasapian
43
23:37
Linear Algebra
Prof. Raffi Hovasapian
34
23:32
Differential Equations
Dr. William Murray, Ph.D.
30
26:33
Science
No. of
Lectures
Duration
(hrs:min)
Chemistry
General Chemistry
Dr. Franklin Ow, Ph.D.
24
16:21
Gen. Chemistry
Dr. Harold Goldwhite, Ph.D.
34
35:20
AP Chemistry
Prof. Raffi Hovasapian
70
60:26
Biochemistry
Prof. Raffi Hovasapian
63
46:39
Organic Chemistry
Dr. Laurie Starkey, Ph.D.
42
54:03
Organic Chemistry Lab
Dr. Laurie Starkey, Ph.D.
16
17:07
Physical Chemistry
Prof. Raffi Hovasapian
93
67:52
Physics
Physics – High School (Theory & Application)
Prof. Vincent Selhorst-Jones, M.F.A.
34
22:46
AP Physics 1 & 2
Prof. Dan Fullerton, M.S.
92
24:35
AP Physics C: Mechanics
Prof. Dan Fullerton, M.S.
29
15:28
AP Physics C: Electricity & Magnetism
Prof. Dan Fullerton, M.S.
26
14:27
AP Physics B
Dr. Radi Jishi, Ph.D.
35
86:03
AP Physics C: Mechanics
Dr. Radi Jishi, Ph.D.
40
48:11
AP Physics C: Electricity Magnetism
Dr. Radi Jishi, Ph.D.
32
41:08
No. of
Lectures
Duration
(hrs:min)
Biology
Life Science (Middle School)
Nehlia McIntyre, M.Ed.
34
12:36
Regular Biology
California Regents
69
21:01
Anatomy & Physiology
Prof. Bryan Cardella, M.Ed.
27
19:01
General Biology
Prof. Bryan Cardella, M.Ed.
37
24:56
AP Biology
Dr. Carleen Eaton, M.D.
60
55:40
AP Environmental Science
Prof. Bryan Cardella, M.Ed.
29
23:21
Microbiology
Dr. Catherine Carpenter, Ph.D.
44
20:01
Molecular Biology
Dr. Michael Philips, Ph.D.
14
14:49
Psychology
Intro to Psychology
Prof. Michael Wheeler
31
12:04
AP Psychology
Charles Schallhorn, M.Ed.
68
39:04
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AP US History
Prof. Elizabeth Turro
63
48:20
AP World History
Prof. Ronald Schooler
70
37:05
Programming
No. of
Lectures
Duration
(hrs:min)
HTML Training
Prof. Brenton Strine, M.S.
20
9:14
HTML 5
Prof. Jim Hague, M.S.
30
6:49
Intro to Ruby Programming
Prof. Justin Mui
22
11:24
Web Design & E-Commerce
Prof. Steven Echavarria, M.S.
18
8:36
Introduction to C++
Prof. Alvin Sylvain, M.S.
16
9:20
Intermediate Level C++
Prof. Alvin Sylvain, M.S.
16
12:30
CSS Intro
Prof. Brenton Strine, M.S.
23
12:20
Java
Prof. Maury Hillstrom, M.S.
10
5:30
AP CompSci: Intro to Java
Prof. Tom Quayle, M.S.
25
12:34
JavaScript
Prof. Maury Hillstrom, M.S.
10
5:54
Introduction to PHP
Prof. Matthew M., M.Eng.
42
22:47
Advanced PHP Training w/ mySQL
Prof. Matthew M., M.Eng.
47
23:43
C#
Prof. John Snape
59
23:49
Visual Basic
Prof. John Snape
62
26:29
XML Training
Prof. Scott Anderson, M.S.
15
4:34
Software Training
No. of
Lectures
Duration
(hrs:min)
QuickBooks (How-To Guide)
Prof. Aaron Woolley
25
8:29
MATLAB
Prof. Arash Vafanejad
28
5:46
Excel Power Query
Bryan Hong
12
3:12
Excel VLOOKUP Fundamentals
Bryan Hong
6
1:13
Microsoft Excel Formulas
Bryan Hong
18
0:51
Microsoft Excel Keyboard Shortcuts
Bryan Hong
6
0:20
Microsoft OneNote
Bryan Hong
14
0:55
Microsoft Outlook Fundamentals
Bryan Hong
10
0:31
Microsoft Power BI
Bryan Hong
6
1:34
Microsoft PowerPoint Fundamentals
Bryan Hong
10
0:23
Microsoft Teams
Bryan Hong
11
1:32
Microsoft Word Fundamentals
Bryan Hong
10
0:27
SQL - Master SQL Database Queries
Bryan Hong
14
1:38
Zoom - Master Video Conferencing
Bryan Hong
9
0:37
No. of
Lectures
Duration
(hrs:min)
Adobe Dreamweaver CC
Prof. Candyce Mairs (Adobe Certified)
152
22:32
Adobe Dreamweaver CS6
Prof. Candyce Mairs (Adobe Certified)
132
18:50
Adobe Photoshop CS6
Prof. Michael Brown (Adobe Certified)
59
19:21
Photoshop Designs to Code
Prof. Candyce Mairs (Adobe Certified)
55
6:55
Edge Animate CC
Chris Grover
66
6:10
jQuery Mobile
Prof. Candyce Mairs (Adobe Certified)
52
5:25
Adobe Illustrator CS6
Prof. Howard Simpson
20
7:31
Adobe Premiere Pro CS6
Prof. John Snape (Adobe Certified)
29
15:25
Adobe Premiere Elements 11
Prof. John Snape (Adobe Certified)
15
6:36
ColdFusion 9
Prof. Candyce Mairs (Adobe Certified)
38
4:15
ColdFusion 9: Application Framework
Prof. Candyce Mairs (Adobe Certified)
40
4:55
Fireworks CS6: Web Workflow
Prof. Candyce Mairs (Adobe Certified)
43
4:19
Adobe Photoshop Elements 11
Prof. Michael Brown (Adobe Certified)
47
15:51
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Language
No. of
Lectures
Duration
(hrs:min)
English Language
English Grammar
Prof. Rebekah Hendershot
32
8:55
Advanced English Grammar
Prof. Rebekah Hendershot
28
6:01
English Composition
Prof. Joel Gonzaga
32
11:18
Application Essays
Prof. Rebekah Hendershot
10
2:28
AP English Language & Composition
Prof. Rebekah Hendershot
28
6:38
AP English Literature & Composition
Prof. Rebekah Hendershot
35
18:14
Shakespeare: Plays & Sonnets
Prof. Rebekah Hendershot
17
7:16
Reading Comprehension
Prof. Joel Gonzaga
29
7:13
Spanish Language
AP Spanish
Prof. Patricia Ponce de Leon
18
9:58
Art & Music
No. of
Lectures
Duration
(hrs:min)
Art & Music
AP Studio Art 2-D
Jessica Spinella
21
3:46
Music Theory
Music Composition
Prof. Laura Ryan, M.A.
20
9:31
Music Theory
Prof. Laura Ryan, M.A.
27
10:56
Music History & Appreciation
Dr. Cory Hills
29
7:22
Music Production
Learn Piano for Beatmakers and Producers
Riley Weller (GratuiTous)
25
2:07
FL Studio Beginners Course
Riley Weller (GratuiTous)
19
4:13
Essential Gear Needed to Make Beats
Riley Weller (GratuiTous)
19
2:09
Advanced Music Production Secrets
Riley Weller (GratuiTous)
29
2:41
FL Studio Intermediate Course
Riley Weller (GratuiTous)
17
4:35
Song Structure and Arrangement Music Course
Riley Weller (GratuiTous)
15
2:29
Foundational Drum Loop Basics
Riley Weller (GratuiTous)
6
2:40
Sample Your Own Music
Riley Weller (GratuiTous)
5
0:34
A Specific Music Production Folder
Riley Weller (GratuiTous)
8
0:58
No. of
Lectures
Duration
(hrs:min)
Creating Organic Beats
Riley Weller (GratuiTous)
24
1:33
How to Use EQ Effectively In Your Songs
Riley Weller (GratuiTous)
27
2:52
Why Do We Producers Use Audio Compression
Riley Weller (GratuiTous)
20
2:23
How to Release a Professional Beat Tape
Riley Weller (GratuiTous)
26
4:26
Music Theory and Chords for Beatmakers
Riley Weller (GratuiTous)
9
1:50
FL Studio Mixer Workflow
Riley Weller (GratuiTous)
15
2:11
Safe Spots: Create Amazing Drum Loops
Riley Weller (GratuiTous)
10
1:10
Musical Rhythms
Riley Weller (GratuiTous)
13
1:27
AP & Test Prep
No. of
Lectures
Duration
(hrs:min)
AP (Advanced Placement)
AP US History
Prof. Elizabeth Turro
63
48:20
AP World History
Prof. Ronald Schooler
70
37:05
AP Language and Composition
Prof. Rebekah Hendershot
28
6:38
AP English Literature & Composition
Prof. Rebekah Hendershot
35
18:14
AP Studio Art 2-D
Jessica Spinella
21
3:46
AP Spanish
Prof. Patricia Ponce de Leon
18
9:58
No. of
Lectures
Duration
(hrs:min)
AP (Advanced Placement)
AP Psychology
Charles Schallhorn, M.Ed.
68
39:04
AP Biology
Dr. Carleen Eaton, M.D.
60
55:40
AP Chemistry
Prof. Raffi Hovasapian
70
60:26
AP Physics 1 & 2
Prof. Dan Fullerton, M.S.
92
24:35
AP Physics B
Dr. Radi Jishi, Ph.D.
35
86:03
AP Physics C: Mechanics
Prof. Dan Fullerton, M.S.
29
15:28
AP Physics C: Electricity/Magnetism
Prof. Dan Fullerton, M.S.
26
14:27
AP Physics C: Mechanics
Dr. Radi Jishi, Ph.D.
40
48:11
AP Physics C: Electricity/Magnetism
Dr. Radi Jishi, Ph.D.
32
41:08
AP Computer Science
Prof. Tom Quayle, M.S.
25
12:34
AP Environmental Science
Prof. Bryan Cardella, M.Ed.
29
23:21
AP Calculus AB
Prof. Raffi Hovasapian
66
44:00
AP Calculus BC
Prof. John Zhu, M.B.A.
33
8:39
AP Statistics
Prof. Sandahl Nelson
18
15:04
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Amazing View of Eight Diagrams City in China

Octagon is a polygon in geometry, which has 8 sides and 8 angles. That means the number of vertices is 8 and the number of edges is 8. All the sides are joint with each other end-to-end to form a shape. These sides are in a straight line form, they are not curved or disjoint with each other. Each interior angle of a regular polygon is 135°, therefore, the measure of exterior angle becomes 180° – 135° = 45°. The sum of the interior angles of the octagon is 135 × 8 = 1080°.