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如图所示，若\(\overrightarrow {O{Z_1}} \)和\(\overrightarrow {O{Z_2}} \)分别表示复数\({z_1} = 1 + 2\sqrt 3 {\rm{i}}\)，\({z_2} = 7 + \sqrt 3 {\rm{i}}\).
判断\(\vartriangle {Z_1}O{Z_2}\)的形状.
参考答案：\(\vartriangle {Z_1}O{Z_2}\)为直角三角形
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