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Transition words in reading and writing
By Snap Language
Transition words help writers connect ideas between sentences and paragraphs. When you read, transitions help you understand not only the ideas themselves but also the relationship between them.
Antonyms and Synonyms
By Vocabulary SpellingCity
Word relationships can be tricky, but understanding them is key to really understanding language. VocabularySpellingCity.com can help! This video lesson explains a little bit about Antonyms and Synonyms.Learn more at http://www.spellingcity.com/synonyms-and-antonyms.htmlSpellingCity has both a free and premium service, the free service on VocabularySpellingCity allows teachers and parents to register and save lists. The premium version of VocabularySpellingCity gives access to the vocabulary and writing materials, the best spelling games, and give students their own login.
Inverse Relations | MathHelp.com
By MathHelp.com
Here we’re asked to solve for x in the equation: log base x of 144 = 2. Notice that we have a logarithmic equation, so let’s first convert the equation to exponential form. Remember that the base of the log represents the base of the power, the right side of the equation represents the exponent, and the number inside the log represents the result, so we have x…squared…= 144. Now, to solve for x, since x is squared, we simply take the square root of both sides of the equation to get x = plus or minus 12. Remember to always use plus or minus when taking the square root of both sides of an equation. However, notice that x represents the base of the logarithm in the original problem, and the base of a logarithm cannot be negative. Therefore, x cannot be equal to negative 12. So our final answer is x = 12.
Area of an equilateral triangle | Perimeter, area, and volume | Geometry | Khan Academy
By Khan Academy
Finding the formula for the area of an equilateral triangle with side s. All Khan Academy content is available for free at www.khanacademy.org
Inverse Functions | MathHelp.com
By MathHelp.com
In this example, we’re given a relation in the form of a chart, and we’re asked to find the inverse of the relation, then graph the relation and its inverse. To find the inverse of a relation, we simply switch the x and y values in each point. In other words, the point (1, -4) becomes (-4, 1), the point (2, 0) becomes (0, 2), the point (3, 1) becomes (1, 3), and the point (6, -1) becomes (-1, 6). Next, we’re asked to graph the relation and its inverse, so let’s first graph the relation. Notice that the relation contains the points (1, -4,), (2, 0), (3, 1), and (6, -1). And the inverse of the relation contains the points (-4, 1), (0, 2), (1, 3), and (-1, 6). Finally, it’s important to understand the following relationship between the graph of a relation and its inverse. If we draw a diagonal line through the coordinate system, which is the line that has the equation y = x, notice that the relation and its inverse are mirror images of each other in this line. In other words, the inverse of a relation is the reflection of the original relation in the line y = x.
The converse of the Pythagorean theorem and special triangles
By MathPlanetVideos
Find the value of x in the right triangle.
Word Problem Involving Perimeter of a Triangle - ex 2
By PatrickJMT
YouTube presents Word Problem Involving Perimeter of a Triangle - ex 2, an educational video resource on math.
Word Problem Involving the Perimeter of a Rectangle – Ex 1
By PatrickJMT
YouTube presents Word Problem Involving the Perimeter of a Rectangle, an educational video resource on math.
Proof of Pythagorean Theorem using similar triangles
By Matt Stryker
Proof of Pythagorean Theorem using similar triangles
Pythagorean theorem 3 | Right triangles and trigonometry | Geometry | Khan Academy
By Khan Academy
This three-minute video is from Sal Khan about using the Pythagorean Theorem to solve a word problem: A carpet measures 7 feet long and has a diagonal measurement of square root of 74 feet. Find the width of the carpet Mr. Khan uses computer software for demonstration. The screen is a little 'busy' so the viewer may want to open the screen to 'full screen' to see all more clearly.
Triangle inequality theorem | Perimeter, area, and volume | Geometry | Khan Academy
By Khan Academy
Salman Khan offers his intuition behind the triangle inequality theorem during this six-minute video lesson.
What is space and how do we study it? Crash Course Geography #3
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
Another Pythagorean theorem proof | Right triangles and trigonometry | Geometry | Khan Academy
By Khan Academy
Khan Academy presents Another Pythagorean Theorem Proof, an educational video resource on math.
Pythagorean theorem 2 | Right triangles and trigonometry | Geometry | Khan Academy
By Khan Academy
In this video, Sal Khan continues discussing the Pythagorean Theorem to solve for the third side of the triangle Mr. Khan uses computer software for demonstration. The screen is a little 'busy' so the viewer may want to open the screen to 'full screen' to see all more clearly.
Pythagorean theorem 1 | Right triangles and trigonometry | Geometry | Khan Academy
By Khan Academy
This is a Khan Academy video about solving a word problem involving the need to find the length of a rope that attaches a mast of a boat with the deck of the boat.
Language Change and Historical Linguistics: Crash Course Linguistics #13
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!