英语翻译The coordinates of the three points A,B,C 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

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• 英语翻译The coordinates of the three points A,B,C 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
• Multiple-Choice:Given that a triangle with vertices A(2,1),B(4,5),and C(6,1) is reflected acrossthe y-axis,what will be the coordinates of the image of (a) (-5,4) (b) (-4,5) (c) (4,-5) (d) (5,-4)
• (1) The coordinates of the three points A,B C on the plane are (-5,-5),(-2,-1)and(-1,-2),resoective(1) The coordinates of the three points A,B C on the plane are (-5,-5),(-2,-1)and(-1,-2),resoectively,the triangle ABC is( ) A,a right triangle ,B an isosceles triangle C,an equilateral triangle D,an obtuse triangle (2)Leta,b and c be rational numbers and b =12/5-13/5a, c=13/5-12/5a, then aXa -bXb+cXc=（ ）
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• The coordinates of the three points A.B.C on the plane are （-5，-5），（-2，-1）and（-1，-2）respectively，the triangle ABC is（　　）
• If the ratio of the degree of exterior angle of∠A，∠B and∠C that are in the triangle ABC is 5：4：3，then the ratio of the degree of∠A，∠B and∠C is（　　）A. 5：4：3B. 3：4：5C. 1：2：3D. 3：2：1
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