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GEOMETRY SOFTWARE ACTIVITY
GEOMETER'S SKETCHPAD
Eric Saltzen, Foothill High School, Sacramento, CA, 2005
Answer the following
questions on a piece of lined paper using the
interactive diagram below.
Question #1: Drag around the point A. Does the line segment from point
A to the line LM move also? How?
Question #2: Drag around the points L and M. Does the line segment from
point A move also? How?
Question #3: Based on your observations, what special kind of geometric
construction is the line segment from point A to the line LM?
Question #4: The red square
indicates something important. What is it?
Question #5: Did you notice the measurement of the distance from the
point to the line? Based on todays lecture and your experiments thus
far, complete the following sentence:
When measuring the distance from a point to a line, we always
measure along the line that is _______________ to the line and
goes through the point.
Perpendicular Bisectors