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Mathematics 8 Online
OpenStudy (anonymous):

Solve for the 20x+5 angle? (picture below)

OpenStudy (anonymous):

OpenStudy (priyar):

these two angles follow which property?

OpenStudy (anonymous):

Im not really sure

OpenStudy (priyar):

they are "SUPPLEMENTARY ANGLES"

OpenStudy (priyar):

coz they are interior angles bet. 2 parallel lines

OpenStudy (priyar):

u know what is supplementary..?

OpenStudy (anonymous):

not really, we just started this unit

OpenStudy (priyar):

ok..

OpenStudy (xmissalycatx):

Supplementary means that the angles are equal to 180 degrees.

OpenStudy (priyar):

supplementary angles means their sum must be 180degrees

OpenStudy (anonymous):

ooooh okay that makes sense

OpenStudy (priyar):

so add the two angles and equate them to 180

OpenStudy (priyar):

solve that eq to get the value of x

OpenStudy (priyar):

so what do u get?

OpenStudy (anonymous):

hang on I need a minute please, do I make an equation like this: 20x+5=24x-1? @priyar

OpenStudy (priyar):

no..where have u used the property we just discussed?

OpenStudy (priyar):

add the angles ang equate to "180" coz they are supplementary..ok?

OpenStudy (priyar):

*and

OpenStudy (anonymous):

supplementary? Im a little confused, can you kind of show me what you mean? @priyar

OpenStudy (priyar):

did u understand the meaning of supplementary..?

OpenStudy (anonymous):

yeah that one part I understand, the angles have to equal 180, like on a triangle

OpenStudy (priyar):

u mean.. the "sum" of the angles have to be equal to 180..right? coz the word "sum" is very important

OpenStudy (priyar):

sum means addition

OpenStudy (anonymous):

I know that part too, I just dont know what to do with the information

OpenStudy (priyar):

if i say A and B are supplementary..then, A+B=180

OpenStudy (priyar):

where A and B are supplementary angles

OpenStudy (priyar):

good so far?

OpenStudy (anonymous):

yep, carry on :)

OpenStudy (priyar):

here also we have A and B..what are they here?

OpenStudy (anonymous):

20x and 24x?

OpenStudy (priyar):

tell me the "full" angles..u r telling only the x-part..why?

OpenStudy (anonymous):

so 20x+5 and 24x-1? I just didnt know if i was supposed to say the whole thing

OpenStudy (priyar):

good..and now u know right..the full expression stands for the angles not just x part

OpenStudy (anonymous):

okay, so far so good

OpenStudy (priyar):

great! now we have our A and B so what must we do with it..see above

OpenStudy (priyar):

@Bissi52802 ?

OpenStudy (priyar):

pls respond

OpenStudy (priyar):

A+B=180 similarly 20x+5+24x-1=180 now just solve for x

OpenStudy (priyar):

@Bissi52802 ???

OpenStudy (anonymous):

Im really sorry I was just told that my cat was ran over thank you for your help

OpenStudy (priyar):

its ok..hope u undertood!

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