Q2 W5 IA (Dilation)

Front

What is a dilation in geometry?

Back

A transformation that alters the size of a figure but not its shape, producing a similar figure.

Front

Does a dilation produce a congruent figure?

Back

No, a dilation produces a similar figure, not a congruent one.

Front

If point Q(1,5) is enlarged to Q'(3,15), how is the enlargement expressed algebraically?

Back

(3x, 3y)

Front

What is the scale factor if a figure is enlarged from a smaller figure to a larger figure?

Back

The ratio of the lengths of corresponding sides of the two figures.

Front

What is the scale factor if the point (8, 12) is dilated to become point (2, 3)?

Back

1/4

Front

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

Back

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

Front

What is the scale factor if a figure is reduced by a factor of 1/3?

Back

It's a reduction; the scale factor is 1/3.

Front

What is the scale factor if a figure is enlarged by a factor of 2?

Back

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

Front

If a figure is dilated by a scale factor of 5:6, what does this mean?

Back

The new figure is 5/6 the size of the original figure.

Front

What happens to the coordinates of a point when it is dilated by a scale factor of 2?

Back

The coordinates are multiplied by 2.