Q2W8 Geo Ratios, Proportions, Scale Factor Flashcard

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Front

Define proportion.

Back

A proportion is an equation that states that two ratios are equal.

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 an object in relation to another object.

Front

How do you find a missing side in similar figures?

Back

To find a missing side in similar figures, set up a proportion using the corresponding sides of the figures.

Front

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

Back

The corresponding angles of similar figures are equal.

Front

What is the relationship between the sides of similar triangles?

Back

The sides of similar triangles are proportional to each other.

Front

How do you calculate the scale factor from a smaller shape to a larger shape?

Back

To calculate the scale factor, divide the length of a side of the larger shape by the length of the corresponding side of the smaller shape.

Front

What does it mean if two shapes are similar?

Back

If two shapes are similar, they have the same shape but may differ in size. Their corresponding angles are equal, and their corresponding sides are proportional.

Front

How can you solve for a variable in a proportion?

Back

To solve for a variable in a proportion, cross-multiply and then isolate the variable.

Front

What is the formula for finding the area of similar figures?

Back

The area of similar figures is proportional to the square of the scale factor.