Classify Triangles by Distance Formula

Is the triangle with vertices (-9, 3) and (7, 9) and (-7, 1) equilateral, isosceles or scalene?

• equilateral

• isosceles

• scalene

Is the triangle with vertices (1, 4) and (-16, 11) and (14, 17) equilateral, isosceles or scalene?

• equilateral

• isosceles

• scalene

Is the triangle with vertices (8, 9) and (-9, -10) and (-16.9544826719043, 14.2224318643355) equilateral, isosceles or scalene?

• equilateral

• isosceles

• scalene

Is the triangle with vertices (7, -7) and (4, -8) and (4.63397459621556, -4.90192378864668) equilateral, isosceles or scalene?

• equilateral

• isosceles

• scalene

If I am trying to prove that a triangle is scalene, what formula would I need to use and how many times do I need to use it?

• Distance, 2

• Distance, 3

• Slope, 2

• Slope 3

Is the triangle with vertices (-7, 7) and (7, 4) and (-5, 7) equilateral, isosceles or scalene?

• equilateral

• isosceles

• scalene

Is the triangle with vertices (7, 3) and (-7, 11) and (5, 19) equilateral, isosceles or scalene?

• equilateral

• isosceles

• scalene

Is the triangle with vertices (5, 4) and (-3, 3) and (1, 11) equilateral, isosceles or scalene?

• equilateral

• isosceles

• scalene

Is the triangle with vertices (1, 8) and (2, 4) and (-1.96410161513775, 5.13397459621556) equilateral, isosceles or scalene?

• equilateral

• isosceles

• scalene

Classify the triangles by side length and angle.

• Right Scalene Triangle

• Not Right Scalene Triangle

• Right Isosceles Triangle

• Not Right Isosceles Triangle