### Home > CCA2 > Chapter 2 > Lesson 2.1.2 > Problem 2-21

2-21.

Plot each pair of points and find the distance between them. Give answers in both square-root form and as decimal approximations.

Draw a right triangle with the hypotenuse segment connecting the given points. Recall the Pythagorean Theorem. Find the difference between the - and

*-coordinates, respectively. Square these values, add them, and find the square root of this value.*

and

and

and

Write the distance you found in part (c) in simplified square-root form.

Rewrite

. Which factor can be simplified further?