Video Gallery

Angles Instruction for Monday

Go to Video Gallery Added Apr 17, 2020 •

Copy this URL:
Embed code:	<iframe class="edlio-embed-player" type="text/html" width="640" height="360" src="//vistagrande.pvpusd.net/apps/embed/?v=254731" frameborder="0" allowfullscreen></iframe> Change dimensions

Go HD

You need a paper, pencil, and your protractor - follow along with the video and practice drawing angles.

Show Transcript

good morning this is Monday video it's an instructional video we're going to work on angles this time you don't need your work  but you need your protractor hopefully you pick them up from school or you have your own and you need a pencil we're going to be working on constructing angles basically drawing angles so I'm going to switch from pencil to 10 to see you guys in Seattle on Saturday play I remember you can pause the video anytime if you need to watch the time to draw what we're drawing so we're just going to start with how to use a protractor to draw an angle so a protractor the math tool helps us draw and measure angles remember all the numbers on this protractor are the degrees of the angle and Arc from tractor that were using metal protector to the doctor has two scales it had what we call an inner scale numbers on the inside outer scale with numbers on the outside and that allows us to measure angles that open in both directions in other words if I have a name Direction up like this then I'm going to be using Interstate 03 here and the angles move up in this direction if I have an angle that's open more like this marijuana use the outer scale where you would see the zero on the outside and the number is moving in this direction and we're going to work on that. start to use the protractor to measure angles but that's why there are two scale degrees and we use the protractor to construct and I remember first of all the parts of the name Eastside Derby line segments like disease that stop or they can be raised that have the arrows besides a razor line segments and then there is a point where those things connect and that's called the vertex the point where they need to warn you ahead of time because the protractor is shining it's going to keep throwing the video off but I'll just keep pausing it trying to get it back for you Acura parts in triangles stop the madness start and you can do this one with me we're going to start by drawing one side of the angle was nice about our protractor is that it works to measure the Angles and also work as a straight edge straight line segments or red so I'm going to start by doing it basically horizontal it doesn't have to be perfectly horizontal but horizontal line about that long mark one side of that line segment with a point and that point is going to become the vertex of our angles I'm going to go ahead and market over here. It doesn't need to be big enough that you can see it clearly now that's the vertex of our angle so let's say we're going to do and 80° 80 degrees I have the vertex and the first side I'm going to use the protractor to measure the 80° I'm going to have my angle opening list from the side here in this direction 74 - - 2 you guys remember this Triangle Center open from here in this Direction all right that means that my zero is going to be where this side is so if you look at the vertex right here on the estate if it's upside down T you find it look at the protractor V is upside down t right there at the center of the TV is where we're going to place the vertex of our angle so if you wash and just going to slide the protractor down right on top of the vertex and then I want to rotate the protractor so that's a zero right ear is lined up with this side of the Angels all right we want to make sure that vertex is still on the T and we want to make sure that the side is coming out as 0 and it is and remember I said my angles going to open in this. Interstate 80 to 82 0 10 20 30 40 50 60 70 80 that's why I want my second side to be so I'm going to use that 80 and put a point marking where the 80s on the 80 once you've marked for the 88 you can slide your protractor off and now you're ready to connect the vertex to that point using straight edge again with your basic angle Construction are we got are connected am I have an 80 degree angle now there's a couple of things and want to add to the tangle to make it complete first of all we always wanted so where we measured they so we're going to brought her there to show that we started here and we went in this direction and then we also want to add letters to name our angle so remember if you watch the video on Friday we talked about how angles are named with three letters so I'm going to go ahead and call this angle that's the angle symbol it'll come back into a v e 80° and now remember when we letters the most important thing to remember is always put them Center letter the s in the tape on the vertex of the app goes here and then the other two letters can go on either side of here and I'm going to put the if you're using line segment the point doesn't have to be at the very end of the line segment can be anywhere along it same thing with rays leave it as line segments or if you choose who you can go ahead and add little arrows and make them red there is our 80° angle angle EFG so if you are still working on this angle go ahead and pause it or rewind it if you need to try it again so we're going to move on and talk about some of the types of angles how we classify them by their side I'm going to draw some more so I can deposit and spend a little more time we're going to move on and I want you the math notes I want you to write everything that I write and draw everything that I drop okay so we're going to talk about the first type of angle remember on Friday I mention that we classify angles number of degrees so the first type of angle that we're going to talk about is the acute angle acute measure less than 90 degrees you are the 90 degrees 3 hour degrees sorry about the focus having a hard time you're the 90 degrees is an acute angle an angle measuring 27 degrees and angle measuring 32 degrees and angle measuring 89 degrees 89.9 degrees 1 degrees C or the 90 degrees is going to be a cute try one of those are 80° angle that way earlier that would be an acute angle we're going to do another one make it a little bit smaller so this is going to be angle to call an angle a and we're going to make it 15 degrees a ABC 15° and this time we're going to have it open in the other direction start the same the first side of the angle is my protractor I'm going to tilt it may be a little bit this time just to practice having it Go in different directions so I'm going to tilt my just a little bit outside one of the angle with my straight edge of the protractor and because I want to have it open in the other direction this time I'm going to put the vertex down here so this is the first side and the vertex of angle ABC and I want to make this a 15° angle so remember to make the angle the vertex needs to go on upside down until I get it on top of the hair we go and then I'm going to rotate protractor until the zero lines up with this because it's opening the other direction is going to open this way I need to use the powder scale this time if I was using the interstate starting at what age doesn't make sense so we're going to use the outer scale starting with zero rotating it around when I get to check my T and I can see that I slipped off so I'm going to make sure he is still on top of the vertex and that my side is coming out at 0 make an appointment at 15 degrees so we're using the outer scale if you look at the outer scale it counts by 10 so is 0 10 20 30 40 15 15 is not actually on the protractor but we know that 15 Falls between 10 and 20 has exactly halfway between we're going to look for that pathway little bit bigger and put our point right there at 15 we're going to slide the protractor off and we're ready to connect our vertex to that point straight edge creating the second side of the angle I'll leave you the straight edge when you're drawing angles so that are accurate or we can call it complete first thing we're going to add is the curve to show where we measured because actually whenever you draw One angle create two angles angle is the angle that we were intending to draw but out here this big out here side is what we call a reflex angle is a second angle I don't want anybody to look at this and think that I meant to stay outer angle so I'm putting this herb so they know that this is the angle I want you to look at when we draw a refund outside the letters this is angle ADC in the middle then we're going to add a and C K and just to review how we name and ABC is one of the names remember you you have to keep the vertex in the middle so the other correct name for this angle leaving the b in the middle switch the A and the Sea so this could be called angles. nickname for the right angle use the vertex if you want to just do it shorts all right this is an acute angle angles see where the 90° are move on to the next type of angle is a right angle so I'm out of space on my paper under blank paper blank is probably for this but either way I'm going to turn mine over like I don't want to squeeze it in and start our next angle which is a right angle answer going to start my. the definition so right angle is going to be exactly 90 degrees and we're going to Triangle RSC we're going to make it 90 degrees a corner of a square or a rectangle Starfighter on one of the sides of the angle and it can point in any direction I'm going to try starting to the side here the first side of the angle is here you can put the vertex on the top or the bottom I think I'm going to use the bottom there's my point. The vertex align the protractor up the vertex with the T getting that t on top of the vertex and then I'm going to rotate it I could go actually either that I already Drew lines up with zero now look my lining up the side with zero there yet noticed that my my vertex has gone way off the tee here's the tea this happens a lot with students and it's why they'll get the degrees off somewhat because of they're lining up 2-0 they don't check to make sure that their vertex hasn't slipped off to so now I need to adjust the vertex lighting is down but keeping that side and 0 all right we're at zero we're going to measure 90° so this time since my zero is in the outer follow this outer scale until I get to 90 degrees Chinese my vertex and that second point I'm going to go ahead and add my labels and my curve no actually on a right angle you probably seen this before often you won't see if Curb and said go see was called a square corner square instead of a curb and that's a signal to anyone that looks even if you were to get it off if they would know that you intended the letters r s t s o s is going to go in the middle the vertex r&t can go on either side I'm right the other names for the angle angle you could also be keeping the vertex asked in the middle or the nickname would be angle about drawing angles we're in the classroom if you were turning in work and I was measuring your angles or if we were taking a test on this I have a rule in most teachers do that you can be a couple of degrees off so let's say you were you actually do when that was 89 degrees or 91° or even 88 or 92 that was still be marked correct it's difficult with a protractor and a pencil of the thickness even of the lads to get it perfect as long as you're with -2 it would still be marked as not a big deal today you should make sure you've drawn these and go more practice he can tomorrow we'll do another video and we'll continue with obtuse angles straight angles and reflux all right there's going to be so this is your instructional video for today there's going to be a second video posted you should see it already. Help you complete the workbook pages if you want to follow on with that video all right

Uploaded by Abigail Maeder.

Video Gallery

Angles Instruction for Monday

Popular Videos