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- Junior one math problem: find the value of x in the following form: (look! )
Junior one math problem: find the value of x in the following form: (look! )
You can arbitrarily connect two diagonal corners to form two triangles, and one of the interior angles of the triangle is 180, so the two triangles are 360.
therefore
x+x+ 140+90=360
x+x=360- 140-90
2x= 130
x=65
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