Assertion: cartesian coordinate system | /r/AtLocation | figure
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Source sentences:
text: Taking into consideration the fact that B' is likely to locate on any position of full-disk solar image, a Cartesian coordinate system A'XY is constructed (as shown in Figure 4, A' will be taken as the origin of the coordinate system), and then the distance between A' and B' can be obtained and expressed as the coordinate, (x,y).
text: A Cartesian coordinate system consists of two perpendicular number lines, called coordinate axes, which meet at a common origin $$O$$, as shown in the figure below.