00:02all right and this one make sure that

00:03everybody remembers how to use the scale

00:05ruler now remember the scale ruler has

00:07multiple scales in it on the same blade

00:10so it has this funny little shape

00:11because we're trying to get as many

00:13scales on the ruler as possible so the

00:16one we're going to use most often in

00:17class is this one I actually gotta flip

00:19it over here the quarter inch ruler and

00:21unfortunately poor rich means that we're

00:23going from right to left so you see it

00:24we started zero and then we go to one

00:27two three four and so on so we're moving

00:29unfortunately from right to left and

00:31we're working in quarter-inch scale what

00:33I want to do right now is to show you is

00:34take we're gonna take a look at the 1

00:36inch and the 1/2 inch side of this blade

00:39here just to make it so easy to see in

00:41the video so remember if we take a look

00:43at this ruler here I'm gonna grab a pen

00:45and write right on it so you can see

00:47you've got this little dollhouse ruler

00:48which little doll house really right now

00:50here that we use to measure inches and

00:52we'll talk about that next

00:53the first we got 0 there of course and

00:55then the very first number we run into

00:56at the beginning here is 10 and that's

00:59not obviously 10 feet right because this

01:00is an half inch scale so 1/2 inch equals

01:04one foot zero inches right so for every

01:06half inch that we're measuring we're

01:08getting one foot so that's obviously not

01:10ten feet that's that's just 1/2 of inch

01:12so the 10 here is coming from the other

01:15direction so we've got the 1 inch scale

01:17that's going from left to right remember

01:19so we start off with zero and then one

01:21and two and three and four and so on all

01:23the way down until we get to 10 at the

01:25opposite end of the ruler so that's 10

01:27feet into 1 inch to the foot scale this

01:30scale over here 1 inch equals one foot

01:32zero inches so we're going to ignore

01:34that one and we're just going to look at

01:36this and say alright that's actually one

01:38the twos the next one we come across

01:40that one's right and then 9 becomes

01:42three and four is good and eight is five

01:45six is fine and then seven is correct in

01:48both directions there's always one

01:50number on the blade for whichever scale

01:53will be different for each one then it's

01:54right in both directions they don't let

01:56that for you an 8 and then 9 10 11 12

01:59and so on right so we're just kind of

02:01going down the blade skipping every

02:02other one and the spacing is a little

02:04different depending on the scale

02:05sometimes there's not even a number

02:07there you said to count lines to figure

02:09out what it is that's very much the case

02:11on the quarter inch scale but that gives

02:12you the idea how this works so what I

02:15measure a couple of these lines we use a

02:17scale world on two different ways one to

02:19measure an existing line like one of

02:21these two lines and then of course to

02:23draw lines and scale I'm just gonna

02:25throw the actual regular ruler on here

02:28right now so that you can see that this

02:31first line here is actually four inches

02:33long in real scale so it's four inches

02:35long in the actual regular scale I'm

02:38just gonna flip over here to the one

02:40inch scale and we're gonna measure this

02:42line as if it were in one inch equals

02:441/4 zero inches which means every inch

02:47and in on the piece of paper is going to

02:49equal one foot in full-scale so I can

02:52put the zero down let's go to your so

02:54you can see what I'm doing I'm gonna put

02:55this zero right there right at the end

02:57of the line and you don't even need to

02:58look at the ruler to see that yep four

03:01it's four feet long as it's four inches

03:05long so that one you don't even really

03:06need the ruler for you can just sort of

03:08do the you know it's really easy to do

03:10the math in your head there but what

03:13happens if we then decide this wants to

03:15be in half-inch scale instead so I've

03:16got my grubby half-inch scale over here

03:18now I'm gonna go from the other corner

03:20to here the other direction line the

03:22zero row up right there to the end of

03:24the line and then of course I'm gonna

03:25come around down over here and see that

03:26yep eight is the answer there so in one

03:30inch scale this equals four foot oops

03:34four foot zero inches and they were here

03:38in the half-inch scale it equals eight

03:40foot zero inches all right

03:42so what is it in if we move here to one

03:45quarter inch equals one foot zero inches

03:48so what's that going to be well we can

03:50measure it I'll measure it again just to

03:51get the practice in but you probably

03:53already know the answer right I'm gonna

03:54find the quarter inch scale in this case

03:56here I'll flip over so it's right set up

03:58for you guys I often times just use it

04:00upside down so I'm going to line up the

04:02zero remember we're reading from right

04:04to left when we're dealing with the

04:06quarter inch side of the blade here I'm

04:08going to put the zero right over there

04:09and we're gonna look over here and see

04:10that yep 16 is how long this line is

04:13because we know that makes sense right

04:14mathematically this is going to be 16

04:16foot zero inches right this is doubling

04:19each time so just one last one we're not

04:21gonna use the ruler for this if we were

04:22to do one eighth of an inch equals one

04:25foot zero inches are we used in that

04:27scale what would that be well

04:29it's gonna be of course 32 feet 0 inches

04:32right so each one of these is doubling

04:33as we make the scale smaller alright

04:36okay but what happens why do we need to

04:39sell a little scale rule that's not easy

04:41to do the math well it's when we have

04:43lines that have inches involved so let's

04:46go back over to our 1 inch scale here so

04:48I'm gonna find my 1 is ruler and I'm

04:50gonna put my 0 on this and this is super

04:52easy right no problem here we know how

04:54to do this maybe a little bit closer

04:56down here so one inch there and it's

04:59over to the oh wait now we got a problem

05:02here so if you see here I'm gonna scooch

05:04over so you can see the end of the line

05:05that's per useful so good line up over

05:07here but it's it's 4 foot but it's not

05:10even quite to the half inch mark we know

05:12that these half inch marks here are 6

05:14inches right because that's half of a

05:15foot so that would be 4 foot 6 inches of

05:18it hit the 12 there but it doesn't it

05:20doesn't come anywhere near to the 5 foot

05:21line so you know it's longer than 4 feet

05:24but not quite 5 feet so what we do well

05:27what we do is we slide it over in the

05:29over to line up with the whole foot so

05:32no it's fourth with something right so

05:33now it's 4 foot then we come out down

05:35over here that little dollhouse ruler

05:37and we can look over and see all right

05:38that's 3 6 9 and 12 right these long

05:41ones and then if we look it a little bit

05:43closer and we can see that maybe bring

05:45it up closer at the camera focus kick in

05:47there you can see the 0 3 6 9 12 all

05:50right and if we put that back where it

05:53then we can see our all right with this

05:55guy isn't it looks like it's about it's

05:57a little bit longer than this what's 3 4

06:005 I'd say that that's 4 foot 5 inches

06:02because it's not 6 inches but it's

06:05definitely hitting that next line over

06:06there so I would say that is a 4 foot 5

06:09inch long line so that's where the

06:11little dollhouse ruler comes in that's

06:12where the scale rule comes in is when

06:14you're trying to draw things or measure

06:17lines that have inches involved it gets

06:18much much easier now the other way we do

06:21this is we say alright well what happens

06:22if I wanted to draw a three foot six

06:25inch line we'll just make an easy one

06:26here in with my ruler so I would go to

06:30put a little mark here at the 3 foot

06:32mark you know it's inside the camera

06:34here so you can see what I'm doing how

06:35about that I'm gonna put a little mark

06:38here at the 3 foot mark then I'm going

06:41to come down here to the 6

06:42mark on the other end now the temptation

06:43might be to use the scale rule to draw

06:46your lines but what you really should do

06:48is come in with the appropriate tool so

06:50if it's you know not any particular

06:52angle you can just grab a triangle and

06:54connect the dots here like so or use

06:58your t-square or some combination of

07:00your tools so that you're drawing a nice

07:01straight line so here I get a little bit

07:03of a little bit of a bleed there because

07:05I using the pen but you won't have that

07:07problem of the pencil but now I've got a

07:09nice straight line that's exactly the

07:11length that I need it to be from those

07:14two little dots so the way you really

07:15want to do this here in fact let's do

07:16one last one here in in quarter-inch

07:18scale the scale you're actually gonna be

07:20drawing and so say you want to have a

07:21wall that's six foot two inches long and

07:24again in quarter-inch scale look how

07:26small this is right this is teeny down

07:28here so you're only gonna do you know to

07:29an inch if you get things to the nearest

07:31inch that's great so I'm gonna say two

07:34inches say that that's a two inches I'm

07:36gonna come over here and go just right

07:38that's the eyes are so close to a three

07:39but oh well what we're gonna do I'm

07:41gonna come down here to the six inch

07:42mark and touch the little dot there I'm

07:44gonna grab my ruler and my straight edge

07:46here and I'm just gonna connect the dots

07:49between those two marks whoops a bit

07:51closer and now I know that that line in

07:53quarter and scale is six foot well three

07:55probably yeah inches long so that's how

07:58you draw lines in scale by just

08:01measuring the points and then drawing a

08:02line between them and then you can also

08:04do the reverse of that when you don't

08:05want to draw the line so hopefully that

08:06will remind you of how the scale rule