### Home > GB8I > Chapter 9 Unit 3 > Lesson CC3: 9.2.5 > Problem 9-129

9-129.

On a coordinate grid, draw a triangle with vertices at

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.