Lesson Progress:

GED Math test contains a formula sheet, which displays formulas
relating to geometric measurement and certain algebra concepts. Formulas are provided to test takers
so that they may focus on application, rather than the memorization, of formulas.

 

AREA of a:

square Area = side2
rectangle Area = length × width
parallelogram Area = base × height
triangle Area = 1/2 × base × height
trapezoid Area = 1/2 × (base1 + base2) × height
circle Area = p × radius2; p is approximately equal to 3.14.

PERIMETER of a:

square Perimeter = 4 × side
rectangle Perimeter = 2 × length + 2 × width
triangle Perimeter = side1 + side2 + side3
CIRCUMFERENCE of a circle Circumference = p × diameter; p is approximately equal to 3.14.

VOLUME of a:

cube Volume = edge3
rectangular solid Volume = length × width × height
square pyramid Volume = 1/3 × (base edge)2 × height
cylinder Volume = p × radius2 × height; p is approximately equal to 3.14.
Cone Volume = 1/3 × p × radius2 × height; p is approximately equal to 3.14.

COORDINATE GEOMETRY distance 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 RELATIONSHIP a2 + b2 = c2; a and b are legs and c the hypotenuse of a right triangle.

MEASURES OF CENTRAL TENDENCY mean = , 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 INTEREST interest = principal × rate × time
DISTANCE distance = rate × time
TOTAL COST total cost = (number of units) × (price per unit)