ACT Prep Math

Front

What is the perimeter of a triangle?

Back

The perimeter of a triangle is the total length of all its sides.

Front

What is the triangle inequality theorem?

Back

The triangle inequality theorem states that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side.

Front

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, 30% of 100 is 100 * 0.30 = 30.

Front

What is a markup?

Back

A markup is an increase in the price of a product, often expressed as a percentage of the original price.

Front

What is a discount?

Back

A discount is a reduction in the price of a product, often expressed as a percentage of the original price.

Front

How do you find the total sales given a percentage increase?

Back

To find total sales after a percentage increase, multiply the original sales by (1 + percentage increase in decimal form).

Front

What is the formula for the area of a triangle?

Back

The area of a triangle is calculated as (base * height) / 2.

Front

What does it mean to simplify an expression?

Back

To simplify an expression means to reduce it to its simplest form by combining like terms and performing operations.

Front

What is a combination in mathematics?

Back

A combination is a selection of items from a larger set where the order does not matter.

Front

How do you calculate the number of combinations?

Back

The number of combinations can be calculated using the formula n! / (r!(n-r)!), where n is the total number of items, and r is the number of items to choose.