Find the perimeter RST. Round answer to the nearest tenth. Show all the work !!!

Given:

The figure of a triangle RST on a coordinate plane.

To find:

The perimeter of the triangle RST.

Solution:

From the given graph it is clear that the vertices of the given triangle are R(-2,7), S(-5,1) and T(-7,-5).

Distance formula:

Using the distance formula, we get

on further simplification, we get

Similarly,

Now, the perimeter of the triangle RST is

Therefore, the perimeter of the triangle RST is 26.0 units.

add 5 subtract 1

step-by-step explanation: