8th Grade Math Staar Quiz

Which of the following transformations preserve conguerence?

I. Translation

II. Reflection

III. Rotation

IV. Dilation

• I and II only

• II, III, and IV only

• I, II, and III only

• I, III, and IV only

Tags

CCSS.HSG.CO.A.2

Given a parallelogram, which of the following would not result in a parallelogram congruent to the original?

• Reflecting the parallelogram over the line y = x.

• Rotating the parallelogram 90 degrees.

• Translating the parallelogram 5 units up and 2 units to the left.

• Dilating the parallelogram by a scale factor of 0.5.

Tags

CCSS.8.G.A.3

Triangle XYZ is rotated 90° clockwise about the origin to form triangle X Y′ ′Z′.

Which statement is true?

• The sum of the angle measures of triangle XYZ is 90° less than the sum of the angle measures of triangle X Y′′′ Z .

• The angle measures of triangle XYZ are less than the corresponding angle measures of triangle X Y′′′ Z .

• Triangle XYZ is not congruent to triangle X Y′′′ Z .

• The area of triangle XYZ is equal to the area of triangle X Y′′′ Z .

Tags

CCSS.8.G.A.3

A transformation is applied to a figure to create a new figure on a coordinate grid. Which transformation does NOT preserve congruence?

• A rotation of 270° counterclockwise

• A reflection across the y-axis

• A dilation by a scale factor of 1.5

• A translation of 50 units down

Tags

CCSS.HSG.CO.A.2

Which rule would result in a translation of 2 units left and 3 units up?

• (x, y) → (2x, 3y)
• (x, y) → (x - 2, y + 3)
• (x, y) → (-x, -y)
• (x, y) → (x + 2, y - 3)

Tags

CCSS.HSG.CO.A.2

Which rule would result in a clockwise rotation of 90° about the origin?

• (x, y) → (y, x)
• (x, y) → (4x, 4y)
• (x, y) → (x, -y)
• (x, y) → (x + 4, y + 4)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Tell whether the two figures are similar. Explain your reasoning.

• Yes, similar because they are the same shape and side lengths are proportional.
• No, not similar because they are the same shape, but side lengths are not proportional.
• Yes, same shape
• No, different sizes

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

What is the y-intercept (b) in the linear function?
y = 5x - 4

• 5
• -4
• -5
• 4

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

<sub>Quadrilateral ABCD was dilated with the origin as the center of dilation to create quadrilateral A'B'C'D'.

Which rule best represents the dilation that was applied to quadrilateral ABCD to create quadrilateral A'B'C'D'?</sub>

• (x,y) becomes (0.4x, 0.4y)
• (x,y) becomes (x+3, y+1.5)
• (x,y) becomes (2.5x, 2.5y)
• (x,y) becomes (x-1.5, y+3)

Tags

CCSS.8.G.A.3

what is the scale factor of the prime image

• 1/3

• 1/4

• 1/2

• 2

Tags

CCSS.HSG.CO.A.2