2021 - 8th Grade Unit Test 1 Review (Real Numbers / Equation

Front

What are real numbers?

Back

Real numbers include all the rational and irrational numbers. They can be represented on the number line.

Front

What is the equation to find the area of a square?

Back

The area of a square is found using the equation A = x², where x is the length of a side.

Front

If the area of a square is 196, what is the length of one side?

Back

The length of one side is 14, since x² = 196 leads to x = 14.

Front

What is a rational number?

Back

A rational number is any number that can be expressed as a fraction a/b, where a and b are integers and b ≠ 0.

Front

What is an irrational number?

Back

An irrational number cannot be expressed as a simple fraction. Its decimal representation goes on forever without repeating.

Front

What is the relationship between rational and irrational numbers?

Back

Rational numbers and irrational numbers are mutually exclusive; they do not overlap.

Front

What is a Venn diagram?

Back

A Venn diagram is a visual representation used to show the relationships between different sets.

Front

How do you solve the equation x² = 196?

Back

To solve x² = 196, take the square root of both sides: x = ±√196, which gives x = ±14.

Front

What is the square root of 49?

Back

The square root of 49 is 7.

Front

What is the difference between a perfect square and a non-perfect square?

Back

A perfect square is an integer that is the square of another integer, while a non-perfect square is not.