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Mathematics 16 Online
OpenStudy (anonymous):

sas congruent postulate?

OpenStudy (anonymous):

geometry

OpenStudy (fibonaccichick666):

what about it?

OpenStudy (anonymous):

i don't understand s-a-s or s-s-s , like the way its taught i wanna like know a simpler way of understanding it cause the postulates are pretty confusing for me =\

OpenStudy (fibonaccichick666):

ok can you tell me what s and a stand for to start?

OpenStudy (anonymous):

side and angle

OpenStudy (fibonaccichick666):

good so do you understand the concept of similarity?

OpenStudy (anonymous):

is that congruency

OpenStudy (fibonaccichick666):

sort of ie, all squares are similar. one may be bigger, but the porportions hold from square to square

OpenStudy (anonymous):

okay like same shape but a different proportion of the sides ?

OpenStudy (fibonaccichick666):

yea, so congruency says that those squares have the same side length. They are identical and similar

OpenStudy (anonymous):

okay so is sasand sss just a way of describing those types of similarities

OpenStudy (fibonaccichick666):

yes, sss tells you that all of the sides of the triangle are the same

OpenStudy (fibonaccichick666):

just like the square ex

OpenStudy (anonymous):

okay and are they the same by the length of each side or the angle? or is it both

OpenStudy (fibonaccichick666):

and sas tells you that 1. 2 sides are the same. and 2 the angle between the sides is the same. (that implies that the 3rd side is the same too)

OpenStudy (fibonaccichick666):

well it ends up being both

OpenStudy (anonymous):

so sss would mean that everything is equal

OpenStudy (fibonaccichick666):

mhmm

OpenStudy (anonymous):

so does sas mean that one of them are different

OpenStudy (fibonaccichick666):

no, it's just another way to show they are equal

OpenStudy (anonymous):

wow thats weird and confusing so what is the different of sas and sss

OpenStudy (fibonaccichick666):

different ways to show the same thing

OpenStudy (fibonaccichick666):

sometimes with the given info, you have one, sometimes the other

OpenStudy (anonymous):

dang thanks i guess ill just keep doing this lesson , i have to learn asa aas amd hl too =\

OpenStudy (fibonaccichick666):

khan academy

OpenStudy (fibonaccichick666):

it'll be your best friend

OpenStudy (anonymous):

i use to watch his vids but idk ,

OpenStudy (fibonaccichick666):

but they aren't bad. they all end up meaning the same thing, just different ways to get there.

OpenStudy (fibonaccichick666):

just like you probably know at least two ways to get home from school right?

OpenStudy (anonymous):

my school is online but yeah, and what are the points of these postulates

OpenStudy (fibonaccichick666):

to show two things are the same

OpenStudy (fibonaccichick666):

ie. you start at one point and can take many ways to get to the same end. Some days, one way is just faster and easier than the others

OpenStudy (anonymous):

wow so i dont really need to know these postulates?

OpenStudy (fibonaccichick666):

yes, you do

OpenStudy (anonymous):

yeah as i continue thru this unit on whatever these postulates are they don't explain much kaybe i was expecting something else, but idk they are pretty confusing do you think id have to memorize this to continue geometry

OpenStudy (fibonaccichick666):

because one day, your normal road will be closed so you have to take a side street

OpenStudy (fibonaccichick666):

and yes, they are pretty basic

OpenStudy (anonymous):

but what will i be solving in geometry that has anything to do with these poistulates

OpenStudy (fibonaccichick666):

everything

OpenStudy (anonymous):

what will i need them for

OpenStudy (fibonaccichick666):

literally everything

OpenStudy (anonymous):

like what like solving for x?

OpenStudy (fibonaccichick666):

parallel lines, triangles finding sides angles proving thms blah blah blah

OpenStudy (fibonaccichick666):

it goes far beyond solving for x

OpenStudy (anonymous):

its weird cause all i do is take test and don'treally have to physically draw anything so im wondering what my test will be when it asks meabout asa and sss and stuff

OpenStudy (fibonaccichick666):

again khan academy

OpenStudy (anonymous):

what would u consider a side and what would u consider an angle when its saying aas

OpenStudy (fibonaccichick666):

they have a great geometry section

OpenStudy (anonymous):

is a like point a then a point b then s point c?

OpenStudy (fibonaccichick666):

|dw:1395200024166:dw|

OpenStudy (anonymous):

no am i right?

OpenStudy (fibonaccichick666):

no,

OpenStudy (fibonaccichick666):

they don't look the same, but they in fact are by AAS

OpenStudy (anonymous):

wow so they are concgruent even with different side

OpenStudy (anonymous):

size

OpenStudy (fibonaccichick666):

yep, why? side C=sideC Angle A=angle A Angle B=angleB

OpenStudy (fibonaccichick666):

doesn't matter what the pic looks like

OpenStudy (fibonaccichick666):

just the actual measurements

OpenStudy (anonymous):

wow thanks i thought they had to be the exact same size but i guess they dont

OpenStudy (fibonaccichick666):

well they actually are, they just don't look like it

OpenStudy (fibonaccichick666):

that is what it means to be congruent, but understand, pictures can be decieving

OpenStudy (fibonaccichick666):

check out purplemath.com 's section on this too

OpenStudy (anonymous):

okay ill check it out thanks alot for your time and help if i ever need any other help ill come to uor someone idk

OpenStudy (fibonaccichick666):

ohk. Seriously though, Khan

OpenStudy (fibonaccichick666):

np

OpenStudy (anonymous):

i tried to quickly watch but im so lost

OpenStudy (fibonaccichick666):

uhh he takes it pretty basic... i don't htink I could make it any simpler :/

OpenStudy (anonymous):

i cant tell the difference at all. they all look the same, im not sure how to differienctiate every triangle with asa or ssa or aas

OpenStudy (anonymous):

its alright i just have a bed time at 9 and im trying to finish this test and his video is 11 minutes long this sucks

OpenStudy (fibonaccichick666):

I mean, there is no telling the difference. it's just if one applies, then they all apply

OpenStudy (fibonaccichick666):

It just depends on your given

OpenStudy (anonymous):

i dont understand , like heres an example triangleABC is congruent to triangleEDC by SAS. How do you know that the included angles ACB and DCE are congruent even though they are not marked?

OpenStudy (fibonaccichick666):

Do you know what vertical angles are?

OpenStudy (anonymous):

yes they are congruent right

OpenStudy (fibonaccichick666):

yep so that means that angle C which is between the two given sides, is the same in both triangles. Hence SAS

OpenStudy (anonymous):

thats confusing but ill get to it soon i guess. i got above 50% i guess thats alrifght for half way knowing

OpenStudy (anonymous):

talk to u later

OpenStudy (anonymous):

thanks again

OpenStudy (fibonaccichick666):

uhm ok np good luck

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