GEO #5 Transformations

What are the angles of rotation for an octagon?

• multiples of 45
• multiples of 51.4
• multiples of 60
• multiples of 72

Reflect (6, -3) over the x-axis. What are the new coordinates of that point after the reflection?

• (6, 3)

• (-6, -3)

• (-3, 6)

• (3, -6)

Which answer shows a reflection across the x-axis?

• d
• c
• b
• a

A triangle with points A(2, 3), B(2, -1), and C(4, 2) is rotated 270° counterclockwise. What algebraic rule describes this transformation?

• ( x, y ) → ( y, -x )

• ( x, y ) → ( -x, -y )

• ( x, y) → ( x, y )

• ( x, y ) → ( -y, x )

Dilate Point B by a scale factor of 1/2

• (1.5,-4)
• (-1.5,1)
• (-1,-1.5)
• (-2,-2)

If you were to rotate ABCD 180° about the origin, what would the coordinate of A' be?

• (3, 5)

• (-3, -5)

• (-5, 3)

• (5, 3)

How many lines of symmetry does this shape have?

• 0
• 1
• 2
• 4

Determine how to translate triangle ABC to triangle A'B'C' using the algebraic rule.

• (x, y) --> (x + 2, y - 5)

• (x, y) --> (x + 2, y - 9)

• (x, y) --> (x - 2, y - 9)

• (x, y) --> (x - 2, y + 9)

Dilate Point B by a scale factor of 3:

• (12,0)
• (12,12)
• (4,3)
• (0,12)

Reflect the point (2, -4) over the y-axis. What are the new coordinates of that point after the reflection?

• (-4, 2)

• (-2, 4)

• (-2, -4)

• (2, 4)