Chapter 3.2 Flashcard Review

Front

What is a representative sample?

Back

A representative sample is a subset of a population that accurately reflects the characteristics of the larger group.

Front

How do you calculate the expected number of students in a larger population based on a sample?

Back

Multiply the proportion of the sample that has a certain characteristic by the total number of individuals in the larger population.

Front

What is the formula for finding the length of a missing side in similar triangles?

Back

The lengths of corresponding sides of similar triangles are proportional. Use the ratio of the known sides to find the missing side.

Front

What does it mean for a relationship to be proportional?

Back

A relationship is proportional if two quantities maintain a constant ratio or rate.

Front

How can you evaluate 78 + 25 mentally?

Back

Break it down: 78 + 20 = 98, then 98 + 5 = 103.

Front

What is the significance of structure in mathematics?

Back

Mathematicians use structure to simplify problems and find solutions more efficiently.

Front

How do you determine the number of dots in a figure based on a pattern?

Back

Identify the pattern and use it to extrapolate the total number of dots in the figure.

Front

What is the concept of scaling in geometry?

Back

Scaling involves resizing a figure while maintaining its proportions.

Front

What is the difference between proportional and non-proportional relationships?

Back

Proportional relationships have a constant ratio, while non-proportional relationships do not.

Front

How do you find the total from a percentage?

Back

Divide the part by the percentage (in decimal form) to find the total.