Scale Factor & Scale Drawings

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, some quantity. It is used to determine the size of a scaled drawing compared to the actual size.

Front

How do you calculate the perimeter of a rectangle?

Back

To calculate the perimeter of a rectangle, use the formula: P = 2(length + width).

Front

If a drawing is scaled by a factor of 2, what does that mean?

Back

It means that every dimension in the drawing is doubled compared to the original size.

Front

What is a scale drawing?

Back

A scale drawing is a representation of an object or area that is proportionally reduced or enlarged from its actual size.

Front

How do you determine if two shapes are similar?

Back

Two shapes are similar if their corresponding angles are equal and the lengths of their corresponding sides are proportional.

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together. It is often expressed as a quantity per one unit.

Front

If a rectangle has a length of 12 feet and a width of 6 feet, what is its perimeter?

Back

The perimeter is 36 feet (P = 2(12 + 6)).

Front

What does it mean for two ratios to be equivalent?

Back

Two ratios are equivalent if they represent the same relationship between numbers, meaning they can be simplified to the same fraction.

Front

How do you find the scale factor between two similar figures?

Back

To find the scale factor, divide the length of a side of one figure by the corresponding side of the other figure.

Front

If a model is built at a scale of 1:100, what does this mean?

Back

It means that 1 unit on the model represents 100 units in real life.