Dilations

Triangle ABC will be dilated by a scale factor of 1/2.  What will be the coordinates of C'?

• (-1, -2.5)
• (12, 6)
• (3, -1.5)
• (0, 1.5)

Tags

CCSS.8.G.A.3

If the scale factor is greater than 1, the dilation is...

• an enlargement
• a rotation
• a translation
• a reduction

Tags

CCSS.8.G.A.3

If the scale factor is less than 1, the dilation is...

• an enlargement
• a translation
• a rotation
• a reduction

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

Which algebraic expression could be the rule for a reduction?

• (x, y)→(2x, 2y)
• (x, y)→(5/2 x, 5/2 y)
• (x, y) →(0.5x, 0.5y)
• (x, y)→(5x, 5y)

Tags

CCSS.HSG.CO.A.2

The algebraic expression for an enlargement by a scale factor of 3 is...

• (x, y)→(3x, 3y)
• (x, y)→(3, 3)
• (3x, y)→(x, y)
• (x, y)→(3x)

Tags

CCSS.HSG.CO.A.2

Triangle ABC will be dilated using the rule (x, y)→(2x, 2y).  What will be the coordinates of C'?

• (12, -3)
• (12, -6)
• (3, -1.5)
• (8, -5)

Tags

CCSS.8.G.A.3

Dilation rules use ______________ to change the ___________ of a shape. 

• addition; location
• division; direction
• subtraction; orientation
• multiplication; size

Tags

CCSS.8.G.A.3

A scale factor of 1/2 reduces a figure.

• True
• False

Tags

CCSS.8.G.A.3