8th Grade Math Review

Front

What is the Pythagorean Theorem?

Back

In a right triangle, the square of the length of the hypotenuse (c) is equal to the sum of the squares of the lengths of the other two sides (a and b). Formula: a² + b² = c².

Front

How do you find the missing side length in a right triangle?

Back

Use the Pythagorean Theorem: a² + b² = c². Rearrange the formula to solve for the missing side.

Front

What is the definition of a negative number?

Back

A negative number is a number that is less than zero, often represented with a minus sign (-).

Front

Which operation results in a negative number?

Back

Subtracting a larger number from a smaller number or dividing two negative numbers.

Front

What is the sum of angles in a triangle?

Back

The sum of the interior angles in a triangle is always 180 degrees.

Front

How do you solve for x in an equation?

Back

Isolate x on one side of the equation using inverse operations.

Front

What does it mean to round a number to the nearest tenth?

Back

To round a number to the nearest tenth, look at the hundredths place. If it's 5 or more, round up; if it's less than 5, round down.

Front

What is the formula for finding the area of a triangle?

Back

Area = 1/2 × base × height.

Front

What is an expression?

Back

An expression is a combination of numbers, variables, and operators (like +, -, ×, ÷) that represents a value.

Front

What is the difference between an equation and an expression?

Back

An equation states that two expressions are equal, while an expression does not include an equality sign.