Scale Factor & Dilations

If the scale factor is less than one, the new figure will be

• an enlargement

• smaller

• a scale factor

• bigger

If the scale factor is greater than one, the new figure will be

• a reduction

• larger

• a scale

• not proportional

What is the scale factor from ΔDEF to ΔABC?

• 1/2
• 7/3
• 2
• 10/3

Tags

CCSS.7.G.A.1

What is the scale factor from ΔDEF to ΔABC?

• 2
• 3/2
• 2/3
• 1/2

Tags

CCSS.7.G.A.1

Enlargement or reduction?  Find the scale factor!

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

Tags

CCSS.8.G.A.3

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.

Tags

CCSS.7.G.A.1

Triangle ABC has vertices A (-2, 2), B (2, 4) and C (3, -1).  What are the coordinates of A' after a dilation by a scale factor of 2.5?

• (-5, 5)
• (5, -5)
• (5, 10)
• (7.5, -2.5)

Tags

CCSS.8.G.A.3

Triangle ABC is dilated so that the coordinates of C' are (2, -1).  What was the scale factor of the dilation?

• 3
• 2
• 1/2
• 1/3

Tags

CCSS.8.G.A.3

A scale factor of 1/2 reduces a figure.

• True
• False

Tags

CCSS.8.G.A.3

If a line segment has a length of 12 units and AFTER a dilation the corresponding image length is 4 units, what was the scale factor?

• 3

• 1/3

• 8