### Home > GB8I > Chapter 8 Unit 9 > Lesson INT1: 8.1.2 > Problem 8-28

On graph paper, draw * *if ,

*, and*

*.*

Verify that

is a midpoint of.To find the midpoint between two points (average

-coordinates, average-coordinates).Write the equation of the line through points

and.Read Math Notes box in Lesson 2.3.2 on linear equations from slopes and/or points.

Calculate the slope between points

and.Using the slope, the

- and-coordinates from pointor, and slope intercept form (). Solve for.Is

*BD*a height of? Use slope to show that is perpendicular to*AC*.Compare the slopes of segment

and segment. What do you notice?What is the perimeter and area of

? Use the Pythagorean Theorem to find the length of all missing sides.

Perimeter

units, Area

Use the eTool below to solve the problem.

Click the link at right for the full version of the eTool: Int1 8-28 HW eTool