Chapter 8 Geometry

Enlargement or reduction?  Find the scale factor!

• It's an enlargement; the scale factor is 1/2.

• It's an enlargement; the scale factor is 2.

• It's a reduction; the scale factor is 1/2.

• It's a reduction; the scale factor is 2.

Determine if the triangles are similar. Justify.

• Yes, by SSS.

• Yes, by SAS. Scale Factor is 1:2.

• Yes, by SAS. Scale Factor is 3:1.

• No, not similar.

How do these triangles appear to be similar?

• AA

• SAS

• SSS

• Not Similar

How do these triangles appear to be similar?
(Hint: Look for non-labeled parts!)

• AA

• SAS

• SSS

• Not Similar

• 50

• 30

• 25

• 15

• X = 14

• X = 12

• X = 15

• X = 18

• X = 14

• X = 16

• X = 18

• X = 13

• X = 15

• X = 20

• X = 25

• X = 18

Find the value of X.

• 4

• 6

• 12

• 7

Dilation changes a shape's __________?

• Size

• Position

• Form

• Orientation