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20050501
(4) Draw a triangle on the Geometry window.
•After drawing a triangle, you can use the measurement box (page 8-3-4) to adjust the
coordinates of points A, B, and C. That will make the following steps easier.
(5) Select the triangle and drag it to the cursor location in the Main application work area.
• This inputs a matrix that shows the coordinates of the triangle’s three vertices into the
work area.
8-2-25
Drawing Figures
(6) Here, try multiplying by the matrix [[–1, 0], [0, 1]] to transform the matrix obtained above
to a form that is symmetrical about the y-axis. Execute the calculation as shown in the
screenshot below.
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