In the xy-plane, the vertices of a triangle have coordinates (0,0), (3,3), and (7,0). what is the perimeter of the triangle?
A. 13
B.根号34
C.根号43
D. 7+6根号2
E. 12+3根号2
我求得斜边=根号58,周长=10+根号58,可选项里没这个答案,请各位多多赐教!
(3根号2)+7+5=12+3根号2
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