Math Formulas for the GED Exam

When taking the GED Math test, you should be familiar with arithmetic and math concepts, measurements, equations, and applying math concepts to solve real-life problems.

However, the math test is not a memorization test! You’ll have access to a formula sheet that gives you information like how to calculate the area for different shapes.

You should get familiar with formulas below just to know what to expect.


AREA of a:

squareArea = side2
rectangleArea = length × width
parallelogramArea = base × height
triangleArea = 1/2 × base × height
trapezoidArea = 1/2 × (base1 + base2) × height
circleArea = p × radius2; p is approximately equal to 3.14.


squarePerimeter = 4 × side
rectanglePerimeter = 2 × length + 2 × width
trianglePerimeter = side1 + side2 + side3
CIRCUMFERENCE of a circleCircumference = p × diameter; p is approximately equal to 3.14.

VOLUME of a:

cubeVolume = edge3
rectangular solidVolume = length × width × height
square pyramidVolume = 1/3 × (base edge)2 × height
cylinderVolume = p × radius2 × height; p is approximately equal to 3.14.
ConeVolume = 1/3 × p × radius2 × height; p is approximately equal to 3.14.

COORDINATE GEOMETRYdistance between points = ; (x1, y1) and (x2, y2) are two points in a plane.slope of a line = ; (x1, y1) and (x2, y2) are two points on the line.

PYTHAGOREAN RELATIONSHIPa2 + b2 = c2; a and b are legs and c the hypotenuse of a right triangle.

MEASURES OF CENTRAL TENDENCYmean = , where the x‘s are the values for which a mean is desired, and n is the total number of values for x.median = the middle value of an odd number of ordered scores, and halfway between the two middle values of an even number of ordered scores.

SIMPLE INTERESTinterest = principal × rate × time
DISTANCEdistance = rate × time
TOTAL COSTtotal cost = (number of units) × (price per unit)

You don’t need to memorize everything listed in this guide! You’ll be handed a Math Formula Sheet.

The GED Math test covers content fields like Number Operations and Number Sense (some 20 to 30 percent), Measurement and Geometry (20 to 30 percent), Data Analysis, Statistics, and Probability (20 to 30 percent), and Algebra, Functions, and Patterns (also some 20 to 30 percent).

The GED Math subtest includes two parts. In part two, the use of a calculator is permitted. You are allowed 115 minutes to deal with all the GED Math questions.


Last Updated on April 19, 2020.

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