What I want to do in this videois talk about the two main ways that triangles are categorized. The first way is basedon whether or not the triangle has equal sides,or at least a few equal sides. Then the other way isbased on the measure of the angles of the triangle. So the firstcategorization right here, and all of these arebased on whether or not the triangle has equalsides, is scalene. And a scalenetriangle is a triangle where none of thesides are equal. So for example, if I havea triangle like this, where this side has length 3,this side has length 4, and this side haslength 5, then this is going to be ascalene triangle. None of the sideshave an equal length. Now an isosceles triangle isa triangle where at least two of the sides have equal lengths. So for example, this wouldbe an isosceles triangle. Maybe this has length3, this has length 3, and this has length 2. Notice, this side andthis side are equal. So it meets the constraint ofat least two of the three sides are have the same length. Now an equilateraltriangle, you might imagine, and you'd be right,is a triangle where all three sideshave the same length. So for example, this wouldbe an equilateral triangle. And let's say that thishas side 2, 2, and 2. Or if I have a triangle likethis where it's 3, 3, and 3. Any triangle where all threesides have the same length is going to be equilateral. Now you might say,well Sal, didn't you just say that anisosceles triangle is a triangle has at leasttwo sides being equal. Wouldn't an equilateraltriangle be a special case of an isosceles triangle? And I would say yes,you're absolutely right. An equilateral trianglehas all three sides equal, so it meets the constraintsfor an isosceles. So by that definition,all equilateral triangles are also isosceles triangles. But not all isoscelestriangles are equilateral. So for example, thisone right over here, this isosceles triangle,clearly not equilateral. All three sidesare not the same. Only two are. But both of theseequilateral triangles meet the constraint thatat least two of the sides are equal. Now down here, we're goingto classify based on angles. An acute triangle is a trianglewhere all of the angles are less than 90 degrees. So for example, a trianglelike this-- maybe this is 60, let me draw a littlebit bigger so I can draw the angle measures. That's a little bit less. I want to make it alittle bit more obvious. So let's say atriangle like this. If this angle is 60 degrees,maybe this one right over here is 59 degrees. And then this angle rightover here is 61 degrees. Notice they all addup to 180 degrees. This would be an acute triangle. Notice all of the anglesare less than 90 degrees. A right triangleis a triangle that has one angle that isexactly 90 degrees. So for example, this right overhere would be a right triangle. Maybe this angle or this angleis one that's 90 degrees. And the normal waythat this is specified, people wouldn't just do thetraditional angle measure and write 90 degrees here. They would draw theangle like this. They would put a little, theedge of a box-looking thing. And that tells you thatthis angle right over here is 90 degrees. And because this trianglehas a 90 degree angle, and it could only haveone 90 degree angle, this is a right triangle. So that is equal to 90 degrees. Now you could imagine an obtusetriangle, based on the idea that an obtuse angle islarger than 90 degrees, an obtuse triangleis a triangle that has one angle that islarger than 90 degrees. So let's say that you have atriangle that looks like this. Maybe this is 120 degrees. And then let's see,let me make sure that this would make sense. Maybe this is 25 degrees. Or maybe that is 35 degrees. And this is 25 degrees. Notice, they still add up to180, or at least they should. 25 plus 35 is 60, plus120, is 180 degrees. But the importantpoint here is that we have an angle thatis a larger, that is greater, than 90 degrees. Now, you might beasking yourself, hey Sal, can a triangle bemultiple of these things. Can it be a rightscalene triangle? Absolutely, you could havea right scalene triangle. In this situationright over here, actually a 3, 4, 5triangle, a triangle that has lengths of 3, 4, and5 actually is a right triangle. And this right over herewould be a 90 degree angle. You could have anequilateral acute triangle. In fact, allequilateral triangles, because all of the anglesare exactly 60 degrees, all equilateral trianglesare actually acute. So there's multiplecombinations that you could have betweenthese situations and these situationsright over here.
The Isosceles Group Meaning
Shrmp & Sasafras recorded their first EP in 1995, under the name MirrorImage. After collaborating with Boya D, Isosceles was officially formed in summer 1997. Their first self-titled EP was released later the same year, and the full length album 'Face The Music' in October 1998. Their latest release as a group read more. Taguig City University AY: ( 2012 - 2013 ) The Isosceles Triangle Theorem by Group Necio E21AM Taguig City University ( 2012 - 2013 ). The Isosceles Group (Isosceles) provides environmental management and occupational health and safety services to industry and governments worldwide. Founded in 1999, our mission is to develop and optimize ESH systems and provide time-critical support in key compliance areas in a cost-effective manner. Equilateral, Isosceles and Scalene. There are three special names given to triangles that tell how many sides (or angles) are equal. There can be 3, 2 or no equal sides/angles.