Math STAAR Review Transformations

Which transformation describes this algebraic representation?

• Rotation 90° clockwise

• Reflection across the y-axis

• Rotation 90° counter-clockwise

• Reflection across the x-axis

Which transformation describes this algebraic representation?

• Rotation 90° clockwise

• Reflection across the y-axis

• Rotation 90° counter-clockwise

• Reflection across the x-axis

If a shape is dilated, how do you find the new perimeter?

• You multiply the old perimeter by the scale factor used in the dilation.

• You square the scale factor used in the dilation. Then multiply the old perimeter by the squared scale factor.

A square is dilated by a scale factor of 4.3. Which statement is true?

• The perimeter of the new square will be 18.49 times the perimeter of the old square.

• The perimeter of the new square will be 3 times the perimeter of the old square.

• The area of the new square will be 4.3 times the area of the old square.

• The area of the new square will be 18.49 times the area of the old square.

• If a is greater than 1, the image of the polygon is congruent to the polygon.

• If a is between 0 and 1, the image of the polygon is congruent to the polygon.

• If a is greater than 1, the image of the polygon is smaller than the polygon.

• If a is between 0 and 1, the image of the polygon is smaller than the polygon

Which transformations preserve congruency?

• Rotation

• Reflection

• Translation

• Dilation

Which transformations preserve orientation?

• Rotation

• Reflection

• Translation

• Dilation

Which transformation does NOT preserve congruency?

• Rotation

• Reflection

• Translation

• Dilation

Answer explanation

remember BIG/Small or Small/Big