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OpenStudy (alibaby):
Which relationship is always true for the angles r, x, y, and z of triangle ABC? x + z = y 180 degrees − x = r x + y + z = 180 degrees x + y + z = 90 degrees
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OpenStudy (alibaby):
OpenStudy (phi):
can you "rule out" any of the choices ?
OpenStudy (alibaby):
wdym
OpenStudy (phi):
are any of the choices not the answer ?
OpenStudy (phi):
the other way to find the answer is to notice that a straight line is 180 degrees in other words, x+r add up (form) a straight line
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OpenStudy (alibaby):
b? @phi
OpenStudy (phi):
yes
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