Unit 4 Similarity: Warm Up

Front

What is similarity in geometry?

Back

Similarity in geometry refers to two figures that have the same shape but may differ in size. Their corresponding angles are equal, and their corresponding sides are proportional.

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, some quantity. In geometry, it is the ratio of the lengths of two corresponding sides of similar figures.

Front

If two triangles are similar, what can be said about their corresponding angles?

Back

The corresponding angles of similar triangles are equal.

Front

If the scale factor is greater than 1, what happens to the figure?

Back

If the scale factor is greater than 1, the figure is enlarged.

Front

If the scale factor is less than 1, what happens to the figure?

Back

If the scale factor is less than 1, the figure is reduced.

Front

What is the relationship between corresponding sides of similar figures?

Back

The corresponding sides of similar figures are proportional.

Front

How do you find the missing length in similar triangles?

Back

To find the missing length in similar triangles, set up a proportion using the lengths of the corresponding sides.

Front

What is the result of a dilation with a scale factor of 1?

Back

A dilation with a scale factor of 1 results in a figure that is the same size as the original figure.

Front

What is the coordinate of the image of point A (2, 4) after a dilation with a scale factor of 3?

Back

The coordinate of the image of point A (2, 4) after a dilation with a scale factor of 3 is (6, 12).

Front

What is the effect of a translation on a figure?

Back

A translation moves a figure from one location to another without changing its size, shape, or orientation.