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9 minGeometry lesson5 CQ
Learn how to identify midpoints, bisectors of segments, trisection points, trisectors of segments, adjacent angles, angle bisectors, and angle trisectors.
6 minGeometry lesson4 CQ
Follow along to three examples that illustrate how to use previously proven theorems, assumptions, and properties in order to write a geometric proof.
6 minGeometry lesson4 CQ
The math problem covered in this lesson appeared in an MIT admission test in the year 1869, and is a good test of geometry concepts. Give it a try!
6 minGeometry lesson4 CQ
In this lesson, Math Fortress presents and proves two basic theorems in geometry, the right angles theorem and the straight angles theorem.
9 minAlgebra lesson5 CQ
This lesson explains the basics of how to write two-column algebraic and geometric proofs. It also covers the elements of an axiomatic system. Let's dig in!
3 minFREEGeometry Nerdy CurioFree2 CQ
As we kick off a new year, let us ponder our we've "shaped" our world. A Nerdy Curio all about flat surfaces, stability, and the power of three.
2 minFREEGeometry lessonFree2 CQ
In this lesson, a young learner helps kids understand a foundational mathematical concept—how to solve for the hypotenuse of a right angle triangle!
19 minFREEAlgebra lessonFree10 CQ
The Pythagorean theorem is one of the most important ideas in geometry. Learn to use Pythagoras’ theorem to solve triangles, diagonals, and more!
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325 min3-part Biology course14 CQ
Preparing for the AP Biology exam? In this three-part course, get clear explanations of Darwinian evolution by natural selection, modern evolutionary theory, and the history of life on Earth.
7107 min7-part iOS Development course57 CQ
Looking for a programming language that can do some heavy-lifting but doesn't take years to master? When programming for iOS, OS X, and watchOS, Apple's programming language Swift is the best choice!
11163 min11-part iPhones + iPads course88 CQ
Want to get the most out of your iPhone? This course from tech expert Todd Olthoff is the perfect guide, for everything from basic installation to built-in app features.
41572 min41-part Arduino course303 CQ
Want to build a new robot friend? How about create a cool LED sign? Whatever the gadget may be, get started with this beginner-friendly Arduino course from Open Source Hardware!
1270 min12-part Science course41 CQ
If you're looking for fun activities for kids that are equal parts science and craft, you'll love this course with lessons covering everything from homemade oobleck to egghead gardens.
11123 min11-part Microsoft Office course68 CQ
Microsoft Access, part of the Microsoft Office Professional suite, is the go-to entry-level software for mass tracking and managing of records. In need of your own data management system for your small business? This 14-lesson course for beginners from Amicron shows you how to use Access to create tables and run queries, sort and filter data using several easy-to-use parameters, work with different data types, and more.with Amicron
Microsoft Access, part of the Microsoft Office Professional suite, is the go-to entry-level software for mass tracking and managing of records. In need of your own data management system for your small business? This 14-lesson course for beginners from Amicron shows you how to use Access to create tables and run queries, sort and filter data using several easy-to-use parameters, work with different data types, and more.
36325 min36-part Web Development course181 CQ
Used on servers all over the Net, PHP is one of the most important web development tools. Learn the basics of PHP, and how to use the programming language to run, access, and edit a MySQL database!
37332 min37-part Databases course185 CQ
Over 37 lessons, this course provides a comprehensive introduction to the open source MySQL database management system so you can develop, maintain, and secure databases in the MySQL environment.
32244 min32-part Basic Computing course137 CQ
Learn the basics of how to use popular application software like Microsoft Word, Excel, and Access to compose text documents, create spreadsheets, edit images and videos, and more!
51598 min51-part Microsoft Office course322 CQ
MS Access 2013 is a powerful database tool for managing nearly every type of information. Get your database set up, and master the basics with this in-depth, user-friendly beginner’s course!