nspire ipad app--tutorial--constructing an isosceles triangle
TRANSCRIPT
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TI-Nspire App Tutorial
Constructing an Isosceles Triangle
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Summary
• In this tutorial, you’ll be constructing an Isosceles Triangle. The steps in the tutorial include:– Creating a Geometry Window.– Constructing a line segment and finding its
midpoint.– Creating a perpendicular line at the midpoint.– Constructing the triangle.– Measuring its side lengths and base angles.
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Create a Geometry Window
Click on the + tool to activate this menu.
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Create a Geometry Window
This is a blank Geometry Window.
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Construct a Line Segment
Click on Menu and select Points & Lines > Segment.
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Construct a Line Segment
Press once to define the left endpoint. Then press again to define the right endpoint. Make sure it’s horizontal.
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Find the Midpoint
Press Menu and click Tools > Measurement > Midpoint.
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Find the Midpoint
Press on the segment to create the midpoint.
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Construct a Perpendicular Line
Click on Menu and press Perpendicular.
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Construct a Perpendicular Line
Press on the Midpoint. You can also extend the perpendicular line by clicking and dragging it.
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Construct the Triangle Sides
Press on Menu and click Tools > Points & Lines > Segment.
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Construct the Triangle Sides
Construct the first side by clicking on one endpoint at the base and creating one on the perpendicular line.
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Construct the Triangle Sides
Press on the Segment Tool again.
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Construct the Triangle Sides
Construct the second side by clicking on the endpoint on the perpendicular line and the other endpoint on the base.
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Measure the Side Lengths
Press Menu and Click Tools > Measurement > Length.
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Measure the Side Lengths
Click on a side length. You’ll see the measurement, which you can move to a different part of the screen.
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Measure the Side Lengths
Press on Menu and Select Length again.
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Measure the Side Lengths
Measure the other side. Note that they are congruent.
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Measure the Base Angles
Press on Menu and Select Angle.
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Measure the Base Angles
Click on the highlighted points to measure this base angle.
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Measure the Base Angles
Click on Menu and Angle to measure the other base angle.
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Measure the Base Angles
Click on the highlighted points to measure this base angle. Notice the base angles are congruent.
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Manipulate the Triangle
Click on any of the vertices of the triangle to manipulate. Notice it maintains congruent sides and base angles.