M 333 L
Fall 2010
Lab Assignment #1
Part I: Geometer’s Sketchpad Tours
Refer to the sections of "Geometer's Sketchpad (Version 4) Learning Guide" which are posted
online in the Handouts folder "Geometer's Sketchpad Learning Guide (Excerpts)". If you purchased
Sketchpad, it came with your software so you have it already :
Read pages 914
Perform Tour #1 (pp. 1620)
At the end of Step 15, print out the state of the sketch at that time and hand it in as page 1
of the solutions. Place in a caption the following information:
.
Name, Lab #1, Tour #1, Step 15.
At the end of Step 20, print out the state of the sketch at that time and hand it in as page 2
of the solutions. Place in a caption the following information:
.
Name, Lab #1, Tour #1, Step 20.
NOTE: When printing a sketch, always select “Print Preview” first and then select “Fit to
Page”.
Otherwise, in some of the larger sketches, the sketch is split over several pages and
is impossible to see and it wastes paper.
Sometimes you need to lower the %reduction
number at the top a little more for it to reduce to a single page.
Perform Tour #2 (pp. 2124), print out the final sketch to hand in as page 3 of the solutions.
Place in a caption the following information: Name, Lab #1, Tour #2
Part II:
Finding the locus of points which are equidistant to two given points.
1.
In a new sketch, draw line segment
AB
which will remain fixed.
2.
Construct a point C and
measure the distances
CA and CB.
To do this, select the two points and and within the “Measure” menu select “Distance”.
3.
Move point C around until the measurements are equal, that is, until CA = CB.
4.
Construct 7 more points and measure their distances to A and B respectively and position
them so that each is equidistant to A and B. Position 4 points in one of the halfplanes
determined by line AB and position the other 4 points in the other halfplane.
5.
Then, complete this conjecture and place it in a caption: "Given a segment, the line which is
perpendicular to the segment and passes through the midpoint of the segment is called the
perpendicular bisector of the segment.
The locus of points which are equidistant to two
points A and B is _____________________________________ ."
6.
Print the final sketch to hand in as page 4.
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View Full DocumentPart III: Constructing the Circumcenter and the Circumcircle of a triangle.
1) Construct a triangle, ΔABC .
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 Spring '10
 Shirley
 Geometry, Hypotenuse, triangle, Sketchpad

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