Video+1


 * Corrections  [[image:missdracul.gif]] 3.5pts **

Video 1: "Geometry Tips : What Is the Pythagorean Theorem?"
I. Before you watch the video answer the following questions. Read the title of the video. What do you think this video will be about? After reading the title, I think this video will be about a mathematic**AL** theorem related to triangles, named Pythagorean Theorem. This theorem states that in every single rectangled triangle, the sum of the square__s__ **(omit the "S")** lenghts of the sides of the triangle that form the right angle equals the square lenght of the longest side, opposite to the right angle, named hypotenuse. Mention five words you think you might listen to in the video. I suppose I will listen **TO** words **SUCH** as "triangle", "square", "lenght", "right angle" and "hypotenuse". ** Yes ** II. Now click on the following link and watch the video. While and after watching, please answer the following questions: [] 1. What is the Pythagoream theorem? It is one of the most known and widely used mathematical theorems. It is related to triangles. It is valid only for rectangle__d__ triangles, and it makes possible to calculate the lenght of one side of a right-angled triangle, no matter which side, if the others__'s__ lenghts are known. **(Omit the underlined parts)**  ** Good ** 2. Why is it said to be exclusive? It is said __it is__ **TO BE** an exclusive theorem because it is valid for all the rectangled triangles, but only for those. It is neither valid for acute-angled triangles nor obtuse triangles. ** Super ** 3. What is a hypothenuse? It is the longest side of a right-angled triangle, which faces the right angle. ** Yes ** 4. What is the name of the other sides of a rectangle triangle? The other two sides, that support the right angle, are named legs. ** Incomplete... Each one has a different name. ** 5. What steps he uses to solve the problem on the video? First, he identifyes which side's length he wants to calculate, depending on which sides's lenghts are known. Then, he subtitutes the information given about the known lengths in the equation. Finally, using arithmetic procedures and some algebra, he finds out the length of the __originnaly__ **(spelling incorrect)** unknown side. ** Yes **