### Home > CC3 > Chapter 9 > Lesson 9.2.5 > Problem 9-129

9-129.

On a coordinate grid, draw a triangle with vertices at *9-129 HW eTool* (Desmos). Homework Help ✎

Find the lengths of each side of the triangle. What is the perimeter?

To find the hypotenuse, we can use the Pythagorean theorem:

If the legs areand , how long is the hypotenuse?

After finding the hypotenuse, find the perimeter.What type of triangle is formed by these points? Justify your answer.

The triangle has a right angle so it is a right triangle.

Use the eTool below to help you with this problem.

Click the link at right for the full version of the eTool: *CC3 9-129 HW eTool*