Rotations

Question 1

Which are not changed after a rotation? Check all that apply.angle measuresorientationsizeshapeposition of center of rotation

Revolt · Accepted Answer

angle measures; size; shape; position of center of rotation

Question 2

After a rotation of 90° about the origin, the coordinates of the vertices of the image of a triangle are A'(6, 3), B'(–2, 1), and C'(1, 7). What are the coordinates of the vertices of the pre-image?

Revolt · Accepted Answer

✔ (3, -6); A: (3, -6); B: (1, 2); C: (7, -1)

Question 3

(-1, 2)✔ (1, 2)(2, -1)(2, 1)

Revolt · Accepted Answer

✔ (1, 2)

Question 4

(-7, -1)(-1, -7)(1, -7)✔ (7, -1)

Revolt · Accepted Answer

✔ (7, -1)

Question 5

After a rotation, A(–3, 4) maps to A'(4, 3), B(4, –5) maps to B'(–5, –4), and C(1, 6) maps to C'(6, –1). Which rule describes the rotation?

Revolt · Accepted Answer

R0, 270°

Question 6

Which shows the image of triangle WXY after the transformation R0, –90°(x, y)?

Revolt · Accepted Answer

[Image: On a coordinate plane, 2 triangles are shown. The ...]

Question 7

Micaela tried to rotate the square 180° about the origin. Is her rotation correct? If not, explain why.

Revolt · Accepted Answer

No, the vertices of the image and pre-image do not correspond.

Question 8

A rectangle was rotated 270° about the origin.The image is shown.Which points are vertices of the pre-image? Check all that apply.

Revolt · Accepted Answer

M(3, 2); N(3, 1)

Rotations Answers

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