Area
Area of a trapezoid
A=.5h(b1+b2)
Pythagorean theorem
a2+b2 = c2
Slope intercept formula
y = mx + b
Probability
total desired outcomes
---------------------------
total possible outcomes
Annotate
Circle numbers. Underline key words. Box question.
Area of a rectangle
A = lw
Degrees in a quadrilateral
360
Distance formula
D = sqrt ((y2-y1)2 + (x2-x1)2)
Mean
sum of items in a set
------------------------
number of items in a set
Trig
SOHCAHTOA
Area of a triangle
A = 1/2bh
Degrees in a straight line
180
m = (y2-y1) / (x2-x1)
Middle number in a set
Determinant of a matrix
ad-bc
Area of a square
A = s2
Degrees in a pentagon
540
Volume of a prism
V=lwh
Mode
Most common number in a set
Fractions
Make them decimals
Area of a circle
A = pi(r2)
Pythagorean triples
3, 4, 5 / 5, 12, 13 / 6, 8, 10 / 9, 12, 15 / 12, 16, 20 / 8, 15, 17
Volume of a cylinder
V=pir2h
Circumference
Perimeter of a circle. C = 2pir
Plug in Answers
If algebraic & answers are numbers. C/H