Question

Whomever please

Answer 1

The perimeter of the triangle is 10.47 units

The distance between two points is given by:

$Distance=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Given the points R(2,1), S (2,5), and T(4,  1). Hence:

$RS=\sqrt{(5-1)^2+(2-2)^2}=4\ units$

$RT=\sqrt{(1-1)^2+(4-2)^2}=2\ units\\\\ST=\sqrt{(4-2)^2+(1-5)^2}=4.47\ units$

The perimeter of the triangle = 4 + 2 + 4.47 = 10.47 units

Find out more on triangle at: brainly.com/question/17335144