Rotation of a figure about a point p in ℝ2 is accomplished by first translating the figure by −p, rotating about the origin, and then translating back by p. See Figure 7. Construct the 3 × 3 matrix that rotates points −30° about the point (−2, 6), using homogeneous coordinates.
(a) Original figure.
(b)Translated to origin by–p.
(c) Rotated about the origin.
(d) Translated back by p.
FIGURE 7 Rotation of figure about point p.
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Chapter 2 Solutions
Thomas' Calculus and Linear Algebra and Its Applications Package for the Georgia Institute of Technology, 1/e
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- Take this test to review the material in Chapters 4 and 5. After you are finished, check your work against the answers in the back of the book. Write the third column of the matrix as a linear combination of the first two columns if possible. [102422751]arrow_forwardUse the standard matrix for counterclockwise rotation in R2 to rotate the triangle with vertices (3,5), (5,3) and (3,0) counterclockwise 90 about the origin. Graph the triangles.arrow_forward
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