Enlargement or reduction? 8.3C

Front

What is dilation in geometry?

Back

Dilation is a transformation that alters the size of a figure but not its shape. It can be an enlargement or a reduction.

Tags

CCSS.8.G.A.3

Front

What is an enlargement?

Back

An enlargement is a type of dilation where the image is larger than the original figure.

Tags

CCSS.8.G.A.3

Front

What is a reduction?

Back

A reduction is a type of dilation where the image is smaller than the original figure.

Tags

CCSS.8.G.A.3

Front

How can you determine if a dilation is an enlargement or reduction?

Back

If the scale factor is greater than 1, it is an enlargement. If the scale factor is less than 1, it is a reduction.

Tags

CCSS.8.G.A.3

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, the dimensions of a figure during a dilation.

Tags

CCSS.8.G.A.3

Front

If a triangle has sides of length 3, 4, and 5, and is enlarged by a scale factor of 2, what are the new side lengths?

Back

The new side lengths will be 6, 8, and 10.

Tags

CCSS.8.G.A.3

Front

If a rectangle has a length of 10 and a width of 5, and is reduced by a scale factor of 0.5, what are the new dimensions?

Back

The new dimensions will be 5 (length) and 2.5 (width).

Tags

CCSS.7.G.A.1

Front

What happens to the area of a figure when it is enlarged?

Back

The area increases by the square of the scale factor.

Tags

CCSS.7.G.A.1

Front

What happens to the area of a figure when it is reduced?

Back

The area decreases by the square of the scale factor.

Tags

CCSS.7.G.A.1

Front

If a square has a side length of 4 and is enlarged by a scale factor of 3, what is the area of the new square?

Back

The area of the new square is 36 square units.

Tags

CCSS.7.G.A.1