Butterflies Unit Review

Butterflies Unit Review

Please take out the Unit Review Worksheets that you started in class yesterday. Play the video on the next screen to check your answers!

Multiple Choice

The polygon DEFG dilates using a scale factor of 1/2.

What is the new coordinate for F'?

• (3.5, 0.5)

• (7, -1)

• (3.5, -0.5)

• (14, -2)

DEFG with a scale factor of 1/2

With a scale factor of 1/2, this means you are finding HALF of each coordinate. The original coordinate for F is (7, -1). Half of 7 is 3.5 and half of -1 is -0.5. This means F' is located at (3.5, -1). When a scale factor is SMALLER than 1, the shape is getting smaller!

Multiple Choice

Triangle ABC dilates using a scale factor of 4. What would the location of B' be?

• (20, 4)

• (5, 1)

• (5, 4)

• (20, 1)

• (1.25, 0.25)

Triangle ABC with a scale factor of 4

If triangle ABC has a scale factor of 4, this means we are multiplying every coordinate by 4. The original coordinate for B is (5, 1). 5 x 4 = 20 and 1 x 4 = 4, so B' is (20, 4). If a scale factor is larger than 1, the shape gets bigger!

Good luck on your test!