SAT Math: Essential Formulas & Concepts

What is the formula for the area of a circle?

A = πr², where r is the radius.

What is the slope-intercept form of a linear equation?

y = mx + b, where m is the slope and b is the y-intercept.

What is the Pythagorean theorem formula for a right triangle?

a² + b² = c², where c is the hypotenuse.

In statistics, how is the median of a data set defined?

The middle value when the data points are arranged in ascending or descending order.

What is the sum of the interior angles of any triangle?

180 degrees.

What is the formula for calculating percent change?

((New Value - Old Value) / Old Value) × 100.

What is the product rule for exponents (xᵃ · xᵇ)?

xᵃ⁺ᵇ (add the exponents).

What is the formula for the area of a rectangle?

Area = length × width (or base × height).

What is the standard form equation of a circle in a coordinate plane?

(x - h)² + (y - k)² = r², where (h, k) is the center and r is the radius.

State the Quadratic Formula used to find the roots of ax² + bx + c = 0.

x = [-b ± √(b² - 4ac)] / 2a.