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Mathematics 15 Online
OpenStudy (anonymous):

help plz!!! Find the measure of angle x in the figure below: 35° 48° 69° 78° @Daniellelovee @bibby

OpenStudy (anonymous):

OpenStudy (bibby):

can you find y?

OpenStudy (anonymous):

ummmm

OpenStudy (bibby):

use the fact that there's a straight line which has 180 degrees 52+y+59=180

OpenStudy (anonymous):

it's 69

OpenStudy (bibby):

correct. now what do the internal angles of a triangle add up to?

OpenStudy (anonymous):

huh?

OpenStudy (bibby):

|dw:1426186318782:dw| what can you tell me about x+y+z

OpenStudy (anonymous):

ummm they're representing the degrees of the angles

OpenStudy (bibby):

what do they add up to?

OpenStudy (anonymous):

to the hidden number

OpenStudy (bibby):

no, the hidden number is x what do x+y+z add up to

OpenStudy (anonymous):

idk

OpenStudy (bibby):

spoiler: it's 180

OpenStudy (anonymous):

oh ok

OpenStudy (anonymous):

@bibby

OpenStudy (bibby):

so you know the internal angles add up to 180

OpenStudy (anonymous):

yes

OpenStudy (bibby):

so replace the angles... x+y+63=180...

OpenStudy (anonymous):

ok

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