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Mathematics 8 Online
OpenStudy (anonymous):

In the accompanying diagram of parallelogram ABCD m

jimthompson5910 (jim_thompson5910):

The adjacent angles of any parallelogram are supplementary

jimthompson5910 (jim_thompson5910):

So m < A + m < B = 180 2x + 15 + x = 180

OpenStudy (anonymous):

Trudat.

OpenStudy (anonymous):

Would you like me to draw the diagram thats on my paper?

OpenStudy (anonymous):

For art practice, yes.

jimthompson5910 (jim_thompson5910):

these angles here are adjacent angles |dw:1365277401968:dw|

jimthompson5910 (jim_thompson5910):

So if they were angles A and B, then they would add to 180 degrees

OpenStudy (anonymous):

hold on, ill show you whats on my paper

jimthompson5910 (jim_thompson5910):

alright, but I think the idea still applies (no matter how your drawing is)

OpenStudy (anonymous):

nvm. So is this what I write on my paper? m < A + m < B = 180 2x + 15 + x = 180

jimthompson5910 (jim_thompson5910):

yes and keep going to solve for x

jimthompson5910 (jim_thompson5910):

once you find x, use it to find m < A

OpenStudy (anonymous):

so you subtract 15 from 180?

jimthompson5910 (jim_thompson5910):

yes

jimthompson5910 (jim_thompson5910):

giving you what?

OpenStudy (anonymous):

2x+x=165

OpenStudy (anonymous):

?

OpenStudy (anonymous):

Yes.

OpenStudy (anonymous):

Then do you subtract x?

jimthompson5910 (jim_thompson5910):

2x+x would turn into 3x

OpenStudy (anonymous):

like 2x-x?

jimthompson5910 (jim_thompson5910):

after you combine like terms

jimthompson5910 (jim_thompson5910):

so we know that 3x = 165

OpenStudy (anonymous):

You now have 2x+x=165 => 3x = 165 x = 165/3

OpenStudy (anonymous):

so you divide by 3 n\and get 55?

jimthompson5910 (jim_thompson5910):

yep x = 55

OpenStudy (anonymous):

thanks!!!!(:

jimthompson5910 (jim_thompson5910):

now plug this into m < A = 2x+15

jimthompson5910 (jim_thompson5910):

to find m < A, which is the measure of angle A

OpenStudy (anonymous):

so you get 125?

jimthompson5910 (jim_thompson5910):

good

OpenStudy (anonymous):

thanks, so thats the final answer?

jimthompson5910 (jim_thompson5910):

yes that's correct

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