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Mathematics 8 Online
OpenStudy (anonymous):

will someone help me

OpenStudy (anonymous):

OpenStudy (anonymous):

So the angle here is a 90 degrees angle again. Same thing with a rectangle, the angle will ALWAYS be 90 degrees.

OpenStudy (anonymous):

10 x - 80 = 90 + 80 + 80 10x = 170 10x/10 = 170/10 x = 17

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