geometers sketchpad helpful hints
TRANSCRIPT
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Geometer’s Sketchpad
Helpful Hints for Beginners
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Open a new file
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To the left are the five basic tools. It is important that you know what tool you have selected while using this software.
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The arrow tool selects objects. When selected it will allow you to move something around the area.
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The point tool creates points.
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The circle tool draws circles.
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The segment tool draws segments. If you click and hold the arrow in the bottom corner, you can draw lines or rays.
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The text tool is used to label points or type text on the file
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This button allows you to add tools or change tool options.
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How to Measure Angles
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Select the ray tool and construct an angle. Remember, they must share the endpoint.
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You can label the angle ABC using the text tool. Click on the points, double click to change the letter.
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Select the points in order either A, B, C or C, B, A. Point B must be the second point selected.
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Select the measure tab.
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Then angle
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How to Construct Perpendicular Lines
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Start off with a segment or line.
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Select the point tool and place a point on the line or line segment.
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With the arrow tool select the new point and click somewhere on the line.
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Construct, then “Perpendicular Line”
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We see perpendicular lines!
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How to Add a Page
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Select File, then Document Options.
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You should see 2 tabs at the bottom left side of your screen.
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How to graph a function on a
coordinate plane
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Type in an equation that you want to graph. (Use the tabs on the right to do specific types of equations.)
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How to Transform a Figure
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Choose Graph, then “define coordinate system”. It might also be helpful if you also choose “snap points” under the Graph tab as well.
Draw a simple shape.
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With the arrow too, select all sides of the figure.
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Choose transform. You can translate, rotate, dilate, or reflect the figure. I will show how to translate and reflect.
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Make sure Rectangular is chosen.
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Select the number of centimeters you want to translate the figure horizontally and vertically.
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To reflect, select the line or axis to be reflected over.
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Transform, then “Mark Mirror”
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Select the sides of the shape.
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Transform, then “Reflect”.
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Quick Tips
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Measure slope of a
lineMeasure Slope
Undo mistakes
Edit Undo
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Measure slope of a
lineMeasure Slope
Change measuring
units, rounding precision
Edit Preferences
Change measuring
units, rounding precision
Edit Preferences
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Change measuring
units, rounding precision
Edit Preferences
+/-/x/÷
Operations with measurements
Measure Calculate