PBS
Career Connections | Pipefitting and Plumbing
Getting water to the drinking fountain and getting waste out of a building are just two jobs for pipefitters and plumbers. A short video details the education and training involved in this rewarding, hands-on career.
Mathematics Assessment Project
Modeling Motion: Rolling Cups
Connect the size of a rolling cup to the size of circle it makes. Pupils view videos of cups of different sizes rolling in a circle. Using the videos and additional data, they attempt to determine a relationship between cup...
Khan Academy
Khan Academy: Trigonometry: Law of Cosines
This is a video showing how to derive the law of cosines. [9:27]
Khan Academy
Khan Academy: Trigonometry: 2003 Aime Ii Problem 11
Video demonstrates solving a trigonometric problem that includes finding the area of an oblique triangle using the Pythagorean Theorem and the law of cosines [16:35]
Khan Academy
Khan Academy: Trigonometry: Proof: Law of Sines
Video deriving the law of sines. Includes discussion of why it is useful. [6:33]
Khan Academy
Khan Academy: Geometry: Similarity Postulates
Explains the minimum amount of information needed to determine if two triangles are similar. Names and illustrates the similarity postulates: AA, SSS, and SAS. [12:14]
Khan Academy
Khan Academy: Geometry: Similar Triangle Basics
Explains the difference between congruent triangles and similar triangles. Introduces the idea of scale factors. [9:17]
Khan Academy
Khan Academy: Geometry: Congruent Triangles and Sss
In this video tutorial [11:29], the instructor explains how to use triangle congruence to identify measures of corresponding sides and angles in triangles. Defines side-side-side (SSS) postulate. Practice problems available.
Khan Academy
Khan Academy: Trigonometry: Basic Trigonometry Ii
Continuation of video lesson introducing the basic trigonometric ratios. Examples of finding sine, cosine and tangent for two different right triangles, including finding side lengths by the Pythagorean Theorem and rationalizing the...
Math TV
Math tv.com: Triangles: The Law of Cosines
The video tutorial investigates how to use the law of cosines to solve for different parts of a triangle. A worksheet consisting of practice problems and solutions is included to check for understanding of the concept. In the left hand...
Math TV
Math tv.com: Trigonometric Functions: Angles, Degress, and Special Triangles
Students learn about the notation and vocabulary associated with angles and triangles. The learning resource consists of a video tutorial and a worksheet with practice problems. In the left hand menu, click Trigonometry, Trigonometric...
Math Planet
Math Planet: Geometry: Triangles
Discussion of triangles through the use of examples and a video lesson. [1:08]
Khan Academy
Khan Academy: Geometry: Identifying Complementary and Supplementary Angles
Shows how to identify complementary and supplementary angles in a diagram. [2:36]
Khan Academy
Khan Academy: Angles: Identifying Complementary and Supplementary Angles
Identifying Complementary and Supplementary Angles
Khan Academy
Khan Academy: Angles: Acute Obtuse and Right Angles
Demonstrates how to find all acute, obtuse, and right angles in a given diagram.
Khan Academy
Khan Academy: Basic Trigonometric Ratios: Using Trig Functions Part Ii
A couple of more examples of using Trig functions to solve the sides of a triangle. This video use the basic trigonometric functions to determine unknown side lengths of a right triangle. Example shows using trigonometry as well as the...
Virtual Nerd
Virtual Nerd: What Is a Triangle?
This tutorial explains triangles and their different types. [5:58]
Virtual Nerd
Virtual Nerd: How Do You Classify Triangles?
If you know what kind of triangle you're looking at, it's much easier to figure out how to solve for various sides and angles. Use this tutorial to practice classifying triangles. [7:15]
Virtual Nerd
Virtual Nerd: What Are Acute, Obtuse, and Right Triangles?
Take a look at this tutorial and learn about some of the different kinds of triangles. [4:25]
Virtual Nerd
Virtual Nerd: What Are Equilateral, Isosceles, and Scalene Triangles?
Watch this tutorial to learn about some of the different kinds of triangles. [5:33]
Virtual Nerd
Virtual Nerd: What Are Complementary Angles?
Complementary angles always add up to 90 degrees. Watch this tutorial to learn about complementary angles and see how to use this knowledge to solve a problem involving these special types of angles. [3:20]
Virtual Nerd
Virtual Nerd: What Are Supplementary Angles?
Take a look at this tutorial as it introduces you to supplementary angles and shows you how to use them to solve for a missing angle measurement. [3:20]
Sophia Learning
Sophia: Congruent Triangles: Lesson 3
This lesson will define the term congruent as it relates to triangles. It is 3 of 11 in the series titled "Congruent Triangles."
Virtual Nerd
Virtual Nerd: What Are Acute, Obtuse, Right, and Straight Angles?
Take a look at this tutorial to learn about the different kinds of angles and how to identify them. [4:15]