Day 8 Finding Scale Factor with vertices.

Front

What is the scale factor?

Back

The scale factor is a number that scales, or multiplies, the dimensions of a figure. It can be greater than 1 (enlargement) or between 0 and 1 (reduction).

Tags

CCSS.7.G.A.1

Front

If the scale factor is between zero and one, the new figure will be:

Back

a reduction.

Tags

CCSS.8.G.A.3

Front

The point (8, 12) was dilated to become point (2, 3). What was the scale factor?

Back

The scale factor is ¼.

Tags

CCSS.8.G.A.3

Front

What is the algebraic rule for a scale factor of 2?

Back

(x,y) → (2x, 2y) (Enlargement).

Tags

CCSS.8.G.A.3

Front

What is the algebraic rule for a scale factor of ½?

Back

(x,y) → (0.5x, 0.5y) (Reduction).

Tags

CCSS.8.G.A.3

Front

If the figure in the picture is reflected across the x-axis, what is the coordinate of M'?

Back

The coordinate of M' is (1, -3).

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What does a scale factor of 1 indicate?

Back

A scale factor of 1 indicates that the figure remains the same size (no change).

Tags

CCSS.8.G.A.3

Front

How do you determine if a scale factor is an enlargement or reduction?

Back

If the scale factor is greater than 1, it is an enlargement. If it is between 0 and 1, it is a reduction.

Tags

CCSS.8.G.A.3

Front

What happens to the area of a figure when the scale factor is 2?

Back

The area of the figure increases by a factor of 4 (2 squared).

Tags

CCSS.7.G.A.1

Front

What happens to the perimeter of a figure when the scale factor is ½?

Back

The perimeter of the figure decreases by a factor of ½.

Tags

CCSS.7.G.A.1