Unit 1 Week 3 Review

Front

What is the formula for the area of a square?

Back

Area = side length × side length

Front

If the area of a square is 81 cm², what is the side length?

Back

9 cm

Front

What is an irrational number?

Back

A number that cannot be expressed as a fraction of two integers.

Front

Which of the following is an irrational number: √7 or 0.727272...?

Back

√7, because it cannot be written as a terminating or repeating decimal.

Front

What are rational numbers?

Back

Numbers that can be expressed as a fraction of two integers.

Front

Are all integers rational numbers?

Back

Yes, because integers can be expressed as fractions (e.g., 5 = 5/1).

Front

What is a perfect square?

Back

A number that can be expressed as the square of an integer.

Front

Is 16 a perfect square?

Back

Yes, because 4 × 4 = 16.

Front

What is the relationship between rational and irrational numbers?

Back

Rational numbers can be expressed as fractions, while irrational numbers cannot.

Front

Can a number be both rational and irrational?

Back

No, a number cannot be both rational and irrational.