### Home > CCG > Chapter 7 > Lesson 7.1.2 > Problem 7-20

7-20.

On graph paper, plot the points and

*.*

*7-20 HW eTool*(Desmos). Homework Help ✎

Find

(the length of).Use the Pythagorean Theorem to find the length of

.Locate the midpoint of

and label it. What are the coordinates of?Use two congruent slope triangles to find the midpoint.

Find

. Can you do this without using the Pythagorean Theorem?Because

*C*is the midpoint, what does that tell you about the length of?

Use the eTool below to find the length and midpoint of

Click the link at right for the full version of the eTool: CCG 7-20 HW eTool