# D. Length of a Line Segment & a Midpoint's coordinates on the Coordinate plane

## Coordinate Geometry

Drag the points A and B to the desired coordinates.
1. Calculate the length of line segment AB
before using the check boxes to reveal the answers.
2. Work out the midpoint's coordinates before using the check boxes to reveal the answer.

## short answer

1. When working on the coordinate plane, if you know the coordinates of the segment's endpoints, describe what you need to do in order to calculate its length. 1a. Give an example to illustrate your answer. Use an oblique segment.

## Short answer

2. When working on a coordinate plane, if you know the coordinates for a segment's endpoints, describe what you need to do in order to determine its midpoint's coordinates. 1a. Give an example to illustrate your description.

## short answer

3. if D( –5, 23) & F(8, 9), then DF = ?

## short answer

4. Get the midpoint of seg. DF, if D( –5, 23) & F(8, 9).