Transformations 2-16

Identify the transformation.

• Reflection across y axis
• Reflection across x-axis
• 180 Rotation
• Translation 2 units down

What does a translation do to a figure on the coordinate plane?

• Rotates it
• Flips it
• Shrinks it
• Slides it

How is the blue triangle rotated to the red triangle?

• 90 clockwise
• 90 counter-clockwise
• 180 clockwise

How you feel

• 
• 
• 
• 

Why is a Triangle called Isosceles?

• It has two sides that match
• It has three sides that match
• It has no sides that match
• It has four sides that match

What is the rule for rotating points 90^o counterclockwise around the origin?

• (-x, -y)

• (y, x)

• (-y, x)

• (y, -x)

Translate the triangle ABC two units to the left and four units up. A(2,5) B(-3, -1) C(1,-2)

• A^'(4,9) B^'(-5, 3) C^'(-1, -6)

• A^'(0,9) B^'(5, 3) C^'(-1, 2)

• A^'(4,9) B^'(-5, 3) C^'(-1, -6)

• A^'(0,9) B^'(-5, 3) C^'(-1, 2)

Choose the rule for reflecting points over the y-axis.

• (-x, y)

• (y, x)

• (x, -y)

• (-x, -y)

Reflect the triangle ABC over the x-axis.

A(9,2) B(-5, -3) C(-1, 6)

• A^'(9,-2) B^'(-5, 3) C^'(-1, -6)

• A^'(-9,-2) B^'(5, 3) C^'(1, -6)

• A^'(-2,9) B^'(-5, -3) C^'(-1, -6)

• A^'(9,2) B^'(-5, -3) C^'(-1, 6)

Dilate the points A and B by a scale factor of 2. Center of dilation is (0,0). A(-4, -2), B(5, -8)

• A^'(2, 4) B^'(8, -5)

• A^'(8, 4) B^'(10, 16)

• A^'(-8, -4) B^'(10, -16)

• A^'(2, -4) B^'(-8, -5)