12/4 HM: Unit 5 Review

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, some quantity. In geometry, it is used to determine how much a figure is enlarged or reduced.

Front

What does it mean if the scale factor is greater than 1?

Back

If the scale factor is greater than 1, it indicates an enlargement of the figure.

Front

What does it mean if the scale factor is less than 1?

Back

If the scale factor is less than 1, it indicates a reduction of the figure.

Front

How do you write the algebraic notation for a scale factor of 1/2?

Back

(x, y) goes to (1/2x, 1/2y)

Front

If a shape is reduced by a scale factor of 1/3, what is the new size compared to the original?

Back

The new size will be one-third of the original size.

Front

What is the scale used in Desmond's drawing of the park?

Back

1 centimeter : 9 meters.

Front

If the actual width of a soccer field is 54 meters, how wide is it in Desmond's drawing?

Back

6 cm.

Front

How do you find the actual size from a scale drawing?

Back

Multiply the size in the drawing by the scale factor.

Front

What is the value of x if James enlarged a drawing and the hint is to convert decimals into whole numbers?

Back

80.

Front

If a shape is enlarged by a scale factor of 2, what happens to its dimensions?

Back

Each dimension of the shape is multiplied by 2.