MATH 213 Midterm: MATH213_ALL-SECTIONS_FALL2007_0000_MID_EXAM_2
10 Jan 2019
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Math 213 Exam 3A Fall 2007 Name____________________________________
1(12). On the grid below, plot the triangle with vertices A = (-3, 5), B = (-1, 2) and C = (-10, -3).
a. Reflect ABC across the diagonal line y=x shown on the grid. Name the image A'B'C'.
b. Reflect A'B'C' across the x axis. Name the image A"B"C".
c. What transformation takes ABC directly to A"B"C"? Be as specific as possible: if a
translation, give the vector; if a reflection, give the line of reflection; if a rotation, give the center
and number of degrees.
2(15). Identify all symmetries of the shapes below: draw in all lines of symmetry present, and
give the # degrees of rotation symmetry if present.
a.
b. c.
x
y
Document Summary
On the grid below, plot the triangle with vertices a = (-3, 5), b = (-1, 2) and c = (-10, -3): reflect abc across the diagonal line y=x shown on the grid. Name the image a"b"c": reflect a"b"c" across the x axis. Be as specific as possible: if a translation, give the vector; if a reflection, give the line of reflection; if a rotation, give the center and number of degrees. Identify all symmetries of the shapes below: draw in all lines of symmetry present, and give the # degrees of rotation symmetry if present. a. x b: consider reflection symmetry. Give two examples of lines of reflection in different: consider glide reflection. Give one example of a glide vector and association line of: consider rotation symmetry. Give one example of a center of rotation and give the: consider translation symmetry. Give two examples of vectors in different directions.
