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Mathematics 7 Online
OpenStudy (anonymous):

What is angle 7?? measure of angle 7 = 2x+15 measure of angle 8 = 3x

OpenStudy (anonymous):

OpenStudy (anonymous):

Diagram ^

OpenStudy (mertsj):

Do you see that 7 and 8 together make a straight angle?

OpenStudy (anonymous):

yeah..

OpenStudy (anonymous):

180 right?

OpenStudy (mertsj):

yes. Add the two together and set the sum equal to 180. Solve the equation.

OpenStudy (anonymous):

@Mertsj soooo 60?

OpenStudy (mertsj):

You got 60 for x?

OpenStudy (anonymous):

Yes...

OpenStudy (mertsj):

Did you write: 3x+2x+15=180 ?

OpenStudy (anonymous):

@Mertsj I must have did it wrong.. I don't know.

OpenStudy (mertsj):

1. Add 3x and 2x 2. Subtract 15 from both sides 3. Divide both sides by 5

OpenStudy (anonymous):

33 :) Thanks!

OpenStudy (anonymous):

@Mertsj ^

OpenStudy (mertsj):

yw

OpenStudy (anonymous):

@Mertsj Wait, so angle 6 is 147 right?

OpenStudy (shamil98):

and 6 and 8 are vertical angles so they are congruent..

OpenStudy (anonymous):

Thanks! :)

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