The district assessment is tomorrow

Click below to see the answers to the review we did today in class.

Open publication - Free publishing - More rational

Pythagorean theorem applied

How could you use the pythagorean theorem if you know only the value of a leg and the hypotenuse? The following video demonstrates how to do that. If you would like more information about the pythagorean theorem you may click here: Pytyhagorean theorem

Pythagorean theorem explained geometrically 2

The following video demonstrates how the pythagorean theorem is may be applied to solve a word problem.

Pythagorean theorem explained geometrically

The pythagorean theorem may be interpreted geometrically by saying that the area of the squares on the legs of the right triangle must equal the area of the square on the hypotenuse. You may see additional information and explanations of this concept by clicking here:Pythagorean theorem

Pythagorean theorem is easy but check to see if you are answering the correct question

The following video demonstrates how to use a problem solving technique when solving word problems involving the Pythagorean Theorem.

Gallery walk

Do not forget that your district assessment is Tuesday of next week. On Monday please bring a signed note indicating that you have studied. You also need to bring your Post test paper back on Monday. Please review the links pertaining to rational numbers, Pythagorean theorem, and scientific notation.



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Pythagorean theorem geometrically speaking

The Pythagorean theorem is " a^2 + b^2 = c^2 " where a and b represent the length of legs and c represents the length of the hypotenuse. This formula is often read as "a squared plus b squared equals c squared." When it says "squared" geometrically you are using actual squares. When you add the areas of the squares on the legs it should equal the area of the square on the hypotenuse. If these areas do not add up then that means that the sides of those squares do not form a right triangle. The video below demonstrates that idea.


Also, the sides of the right triangle that form the 90 degree angle are called legs because they support the hypotenuse the same way that our legs keep us from falling. Also the hypotenuse comes from Greek words ( hypo - which means under, and teinein - which means to stretch) that give us the idea that it is the line that is stretched between the two legs of the right triangle.

No Homework tonight.



Also, don't forget that if you have trouble with pythagorean theorem you may see some more examples on our wiki.

Answers to our last test

Most periods did well on the test, however there were some popular mistakes. These mistakes are discussed in the video below. Also, do not forget that everything that we will do for the year is shown on the podcast and on our class wiki.

You may explore topics like scientific notation and pythagorean theorem on the wiki.

On each of those pages there are example TAKS problems, but there is also a separate page dealing with the TAKS test

More on estimating square roots

Today many of us were able to estimate the square root of irrational numbers. For those still experiencing difficulty just remember that your perfect squares tell you what numbers your estimated square root should be between. For example if we needed to find out the square root of 28, we know that 28 is between the perfect squares 25 and 36. Since the square roots of these numbers are 5 and 6 respectively, then the square root of 28 is going to be a number between 5 and 6. We can then guess and check our answer by multiplying that value by itself. The following video contains an example. You may also click here for more information on estimating irrational numbers.


The homework tonight is to read pages 148-9 and complete problems 9-25 (odd), 27-31, 33-42. Also, this week you have a study island assignment. The assignment is titled: "Rational and Irrational numbers 3." I will give you until next Friday to complete this study island assignment. Please remember that you may redo it for a higher grade. Do not guess because it will make your grade lower. Also you have a test this Friday.