✓ Lesson Check

Do you know HOW?

1. The blue figure is a dilation image of the black figure with center of dilation C. Is the dilation an enlargement or a reduction? What is the scale factor of the dilation?

   

A dilation has center (0, 0). Find the image of each point for the given scale factor.

2. D ( 1 , − 5 ) ; 2 d open 1 comma negative 5 close semicolon 2
3. T ( 0 , 6 ) ; 1 3 t open 0 comma 6 close semicolon , 1 third
4. M ( 0 , 0 ) ; 10 m open 0 comma 0 close semicolon 10

Do you UNDERSTAND?

5. Vocabulary Describe the scale factor of a reduction.

6. Error Analysis The blue figure is a dilation image of the black figure for a dilation with center A.

   

   Two students made errors when asked to find the scale factor. Explain and correct their errors.

   1. 
   2.