Rotations Exploration 1 - 90° (Student Copy)
Work with the teacher.
a. Draw a triangle with vertices at A(1,3) B(4,3), and C(4, 1).
b. Create a point at the origin D(0,0).
c. Rotate the triangle 90° clockwise about the origin to form triangle A'B'C'.
d. What is the relationship between the coordinates of the vertices of triangle ABC and those of triangle A'B'C'? Write a rule to determine the coordinates of the image of (x, y).
Try it yourself.
a. Draw a triangle with vertices at A(1,3) B(4,3), and C(4, 1).
b. Create a point at the origin D(0,0).
c. Rotate the triangle 90° counterclockwise about the origin to form triangle A'B'C'.
d. What is the relationship between the coordinates of the vertices of triangle ABC and those of triangle A'B'C'? Write a rule to determine the coordinates of the image of (x, y).