Download Math Formula Sheet - i

Math Formula Sheet
You will have access to a formula sheet on your High School Equivalency Exam. However, even with the
formula tip sheet, you will still need to know how and when to apply a formula.
Notes:
• π ≈ 3.14
• p = perimeter of base with area B
• I = interest, P = principal, r = rate, and t = time
Area:
Square: A = s
2
Triangle: A =
1
bh
2
Rectangle: A = lw
Trapezoid: A =
Parallelogram: A = bh
Circle: A = π r 2
1
h(b1 + b2 )
2
Perimeter:
P = 4s
Square:
Rectangle: P = 2l + 2w
Triangle: P = s1 + s2 + s3
Circumference of a circle: C = 2π r OR C = π d
Surface Area:
Rectangular / right prism: SA = ph + 2B
Cone: SA = π rs + π r 2
Cylinder: SA = 2π rh + 2π r 2
Sphere: SA = 4π r 2
Pyramid: SA =
1
ps + B
2
Volume:
1 2
πr h
3
Rectangular / right prism: V = Bh
Cone: V =
Cylinder: V = π r 2 h
Sphere: V =
Pyramid: V =
1
Bh
3
© 2015 ICCB and CAIT
®
4 3
πr
3
i-pathways.org
The GED Mark is a registered trademark of the American Council on Education.
1
Math Formula Sheet
Algebra
Slope of a line: m =
y2− y1
x2− x1
Pythagorean theorem: a + b = c
2
2
2
Slope-intercept for of the equation of a line: y = mx + b
Simple interest: I = Pr t
Point-slope form of the equation of a line:
y − y1 = m(x − x1 )
Distance Formula: d = rt
Standard form of a quadratic equation: y = ax 2 + bx + c
Total Cost: (number of units) x ( price per unit)
Quadratic Formula: x =
−b ± b 2 − 4ac
2a
Mean: The mean is equal to the total of the values of a data set, divided by the number of elements in the data set.
Median: Median is the middle value in an odd number of ordered values of a data set, or the mean of the two
middle values in an even number of ordered values in a data set.
© 2015 ICCB and CAIT
®
i-pathways.org
The GED Mark is a registered trademark of the American Council on Education.
2