MCAS Math Test Preparation - MathHelp.com - By MathHelp.com
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| 00:0-1 | The following is a selected video from your teacher.com where | |
| 00:03 | you can browse over 450 complete math lessons with example | |
| 00:07 | videos , interactive practice problems , self tests and more | |
| 00:11 | . Try a complete lesson today at your teacher dot | |
| 00:14 | com to find the value of X . In this | |
| 00:21 | example , notice that we have a right triangle so | |
| 00:26 | we can use the pythagorean theorem . The pythagorean theorem | |
| 00:31 | states that the sum of the squares of the lengths | |
| 00:34 | of the legs of a right triangle is equal to | |
| 00:38 | the square of the length of the hypotenuse , or | |
| 00:42 | a squared plus B squared equals C squared where A | |
| 00:50 | and B . Are the legs of the right triangle | |
| 00:54 | and C . Is the hypotenuse . So here , | |
| 00:59 | since our legs have lengths of six and 8 and | |
| 01:03 | our hipaa tennis has a length of X . We | |
| 01:07 | can set up the equation six squared plus eight squared | |
| 01:15 | equals x squared solving from here , six squared is | |
| 01:23 | six times six or 36 and eight squared is eight | |
| 01:29 | times 8 or 64 . So we have 36 plus | |
| 01:35 | 64 equals x squared , 36 plus 64 is 100 | |
| 01:43 | . So we have 100 equals X squared now to | |
| 01:50 | get X by itself , since X is being squared | |
| 01:54 | , we must take the square root of X , | |
| 01:58 | and if we take the square root of the right | |
| 02:01 | side of the equation , we must also take the | |
| 02:04 | square root of the left side of the equation On | |
| 02:08 | the left , the square root of 100 is 10 | |
| 02:13 | , and on the right , the square root of | |
| 02:15 | x squared is X . So our answer is 10 | |
| 02:21 | equals x . |
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