Question

Find the lengths of the sides of the triangle, then click to identify the triangle as scalene, isosceles, or equilateral. R(1, 3), S(3, 1), T(5, 2)

Answer 1

Scalene triangle. 
All three segments are different lengths so it is a scalene triangle.
Use the distance formula $Distance =\sqrt{(x_2 -x_1)^2 + (y_2- y_1)^2}$ to find the distance of the three segments.
$RT=\sqrt{(1 -5)^2 + (3- 2)^2} =1.4$
$TS=\sqrt{(3 -5)^2 + (1- 2)^2} =2.2$
$RS=\sqrt{(1 -3)^2 + (3- 1)^2} =2.8$