I think I got forgotten...

What is the perimeter of triangle PQR with vertices P(–2, 9), Q(7, –3), and R(–2, –3) in the coordinate plane? (1 point)
21 units
25 units - ??
34 units
36 units

4 answers

First draw out your triangle .

It gives you the length of two of the side

Vertices (-2,9) and (-2,-3) have the same x values so the line is straight up and down. Find the distance between the y values to find the length of that side

Vertices (-2,-3) and (7,-3) have the same y values. Find the difference in x values to find that length.

Then use the Pythagorean Theorem to find the last side

Then add all the side lengths for the perimeter

36 units, right?

Yes

Thank you