The coordinates of the three points A,B,C on the p

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The coordinates of the three points A,B,C on the p

公主 影儿

发布日期:2013-08-15 15:07:08

The coordinates of the three points ABC on the plane are (-5,-5),(-2,-1) and

(-1,-2),respectively,the triangle ABC is ( )

A.a right triangle B.an isosceles triangle

C.an equilateral triangle D.an obtuse triangle