Math Formulas Flashcards
Word Problems: Discount =
Cost x Rate of Discount
Word Problems: Interest =
Principal x Rate x Time
Word Problems: Distance =
Rate x Time
Geometry–Rectangles & their variants: Perimeter of a Square =
4 x Side
Geometry–Rectangles & their variants: Perimeter of a Rectangle =
(2 x Length) + (2 x Width)
Geometry–Rectangles & their variants: Area of a Rectangle =
L x W
Geometry–Rectangles & their variants: Area of a Square =
S^2
Geometry–Rectangles & their variants: Area of a Parallelogram =
Base x Height
Geometry–Rectangles & their variants: Area of a Trapezoid =
1/2 (B1 + B2) x Height
Geometry–Circles: Diameter of a Circle =
2 x Radius
Geometry–Circles: Circumference of a Circle =
π x Diameter
OR
2π x Radius
Geometry–Circles: Area of a Circle =
πr^2
Geometry–Triangles: Area of a Triangle =
1/2 Base x Height
Geometry–Triangles: Pythagorean Theorem =
a^2 + b^2 = c^2
The square of the length of the hypotenuse is equal to the sum of the squares of the legs.
Geometry–Triangles: Distance Formula =
d= the square root of [(X1—X2)^2 + (Y1 —Y2)^2]
Distance between two points P1 (X1, Y1) and P2 (X2, Y2)
x^-a =
1/x^a
(x^a)(x^b)
x^(a-b)= 1/[x^(b-a)]
x^0=
1
(x^a)(y^a)=
(xy)^a
a^2-b^2=
(a+b)(a-b)
(x/y)^a=
x^a/y^a
(x^a)^b=
x^ab
Simple interest
V=P(1+(rt/100))
Compound interest: annual interest rate of r percent compounded annually
V= P(1+(r/100))^t
