is the triangle scalene, isosceles, equilateral, or acute?

Question

The coordinates of ΔABC are A(2,2), B(8,10), and C(13,-2). Classify the triangle by its side length. Is it scalene, isosceles, equilateral, or acute?

Answer 1

sides are 10, 13 and sqr137=about 11.7

it's not equilateral, no isosceles, not obtuse,

it's scalene and acute

scalene is a triangle with 3 sides all different lengths and 3 angles all different degrees

acute is a triangle with all 3 angles less than 90 degrees