Area perimeter and volume of rectangle - By tecmath
Transcript
| 00:00 | this video is looking at the basics of area perimeter | |
| 00:03 | and volume of rectangular shapes , something you were using | |
| 00:06 | , a fair fair amount of in building . So | |
| 00:10 | first off , we're gonna have a look at perimeter | |
| 00:13 | to help you explain parameter . I'm going to use | |
| 00:15 | this house plan here . The perimeter were quite simply | |
| 00:18 | , is a distance around the outside of the shape | |
| 00:20 | of a rectangular shape and you'll be using it a | |
| 00:23 | fair bit in building or something like that . They | |
| 00:25 | were working at the guttering or the eaves required on | |
| 00:28 | a house . Okay , so we first off mark | |
| 00:32 | on these outsides , You see 818 , the next | |
| 00:36 | side , 12 1 , decide after that , going | |
| 00:42 | around 818 and the final side is 12 1 to | |
| 00:51 | work at the perimeter . What we would do is | |
| 00:53 | we would add all these measurements together . You do | |
| 00:56 | this and the answer you get , It's 40,720 , | |
| 01:01 | Or roughly , just under 41 m of material , | |
| 01:04 | you know , whatever could be facial guttering , anything | |
| 01:07 | like that . So that's the perimeter . Pretty simple | |
| 01:12 | . Just add all the outside measurements together . Next | |
| 01:15 | we'll get onto the area . The area is a | |
| 01:18 | measurement of death . The manner space . The two | |
| 01:20 | dimensional object has a measure of length by week . | |
| 01:24 | Okay , in the for example , here I have | |
| 01:27 | a floor which measures six m by four m . | |
| 01:32 | Very simply to work the area out . You just | |
| 01:35 | get six times by four . Only get the answer | |
| 01:37 | of 24 m2 . We'll just check this out . | |
| 01:41 | So what I'm doing right now , I'm separating all | |
| 01:45 | little parts of the length and the width into the | |
| 01:48 | individual meters and we can count them up . Okay | |
| 01:53 | . Been done for the width nationally and there we | |
| 01:58 | go . So now we can count these up . | |
| 02:00 | 1 , 2 , 3 , 4 All the way | |
| 02:04 | through 24 m squared . As you'll see the units | |
| 02:09 | there are in meters squared . Okay . The actual | |
| 02:13 | measurement is a meter by meter that we're talking about | |
| 02:15 | each of these 24 little things . Okay . And | |
| 02:17 | that's why it's written as a squared . Okay . | |
| 02:21 | Next we're going to look at his volume . Okay | |
| 02:25 | . Volumes . Basically where we've got a two dimensional | |
| 02:28 | object and we've extended it with third plane and so | |
| 02:32 | what we're looking at is three different measurements Measureed going | |
| 02:35 | to be looking at here . The little box , | |
| 02:36 | two m . Why four m by three m . | |
| 02:44 | You have separated up into all these little boxes here | |
| 02:47 | . Yeah . The way that you'd work out the | |
| 02:49 | volume is very , very simple . You just multiply | |
| 02:51 | the length , the which and it did . Which | |
| 02:55 | is three times 4 times two . Would you give | |
| 02:59 | you the answer of 24 m3 began to write that | |
| 03:04 | meters with a little thrill above it . Many cute | |
| 03:07 | . There's three sides are dealing with . Okay , | |
| 03:11 | so this is all very , very easy , major | |
| 03:13 | difference with all these things here . You can consider | |
| 03:16 | it quite easily . Things like perimeter , You're just | |
| 03:19 | adding up all the things around the outside . If | |
| 03:21 | you're dealing with area , you just multiplying the length | |
| 03:25 | of time with , you're dealing with volume , you're | |
| 03:27 | multiplying the width , length , and depth . Okay | |
| 03:31 | , so you're going to be dealing with a fair | |
| 03:33 | bit with building if you luck with that . |
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Area perimeter and volume of rectangle is a free educational video by tecmath.
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