Test review

A regular decagon has 10 sides. How many reflectional symmetries does a regular decagon have?

10

Rectangle A'B'C'D' is the image of rectangle ABCD after it has been translated according to the rule T-4, 3(x, y).

(-1, -2) (7, 1) (-1, 1) (7, -2)

A square on a coordinate plane is translated 9 units down and 1 unit to the right. Which function rule describes the translation?

T1, -9(x, y)

Which figure represents the image of trapezoid LMNP after a reflection across the x-axis?

figure A

What is the rule for the reflection?

ry-axis(x, y) → (-x, y)

What is the minimum angle of rotational symmetry for the quadrilateral shown below?

360°

Which statement describes the order of rotational symmetry for an isosceles triangle?

An isosceles triangle has an order 1 rotational symmetry because it does not have all congruent angles.

Which diagram has all the correct lines of reflectional symmetry for the rectangle?

B

Quinton tried to transform triangle FGH according to the rule (x, y) → (-y, x). Which best describes his attempt?

Correct. He transformed the triangle according to the rule (x, y) → (-y, x).

Triangle QRS is transformed as shown on the graph. Which rule describes the transformation?

R0, 270°

Triangle XYZ with vertices X(0, 0), Y(0, -2), and Z(-2, -2) is rotated to create the image triangle X'(0, 0), Y'(2, 0), and Z'(2, -2). Which rules could describe the rotation? Check all that apply.

R0, 90° (x, y) → (-y, x)

Square PQRS is transformed as shown on the graph.

R0,90

Triangle EFG has vertices E(-3, 4), F(-5, -1), and G(1, 1). The triangle is translated so that the coordinates of the image are E'(-1, 0), F'(-3, -5), and G'(3, -3). Which rule was used to translate the image?

T2, -4(x, y)

Which statements are true about trapezoid ABCD and its translated image, A'B'C'D'? Check all that apply.

The rule for the translation can be written as T-3, 1(x, y). The rule for the translation can be written as (x, y) → (x - 3, y + 1).

A point has the coordinates (m, 0) and m ≠ 0. Which reflection of the point will produce an image located at (0, -m)?

a reflection of the point across the line y = -x