Area of a Triangle | MathHelp.com - By MathHelp.com
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| 00:0-1 | to find the area of the triangle shown . We | |
| 00:03 | use the formula area of a triangle equals one half | |
| 00:08 | , base times height , since the base of the | |
| 00:12 | triangle is 18 inches and the height of the triangle | |
| 00:16 | is eight inches . We can plug this information into | |
| 00:19 | the formula To get 1/2 times 18 inches times eight | |
| 00:28 | inches . Simplifying from here , it's important to understand | |
| 00:34 | that we can multiply these numbers together in any order | |
| 00:37 | we want , for example , we can multiply one | |
| 00:40 | half by 18 inches , then multiply by eight inches | |
| 00:45 | . Or we can multiply 18 inches by eight inches | |
| 00:49 | , then multiply by one half . The easiest way | |
| 00:52 | to do this problem is to multiply one half by | |
| 00:56 | 18 to get nine inches . Then multiply by eight | |
| 01:07 | and nine times 8 Is 72 squared . So the | |
| 01:15 | area of the triangle shown is 72 sq in . | |
| 01:23 | Notice that the height of this triangle is not one | |
| 01:26 | of the sides of the triangle . It's important to | |
| 01:29 | understand that the height of a triangle does not have | |
| 01:32 | to be aside |
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