Must Know Flashcards
1
Q
Average
A
S/T (Average = Sum/Number of things)
2
Q
Slope intercept form
A
y = mx + b (where m is the slope and b is the y-intercept)
3
Q
Slope
A
Y2-y1
X2-x1
4
Q
Area of a triangle
A
1/2bh (1/2 base x height)
5
Q
Pythagorean theorem
A
a2 + b2 = c2
6
Q
Perimeter of a rectangle
A
2l + 2w (where l is the length and w is the width)
7
Q
Area of a rectangle
A
lw (length × width)
8
Q
Volume of a box
A
LxWxH
9
Q
Surface area of a rectangular solid
A
2lw + 2wh + 2lh
10
Q
Diagonal in a rectangular solid
A
Apply the Pythagorean theorem twice or l2 + w2 + h2 = d2
11
Q
Area of a circle
A
πr2
12
Q
Circumference of a circle
A
2πr
13
Q
Volume of a sphere
A
4 / 3πr3
14
Q
Volume of a cylinder
A
πr2h
15
Q
SOHCAHTOA
A
sin x = opposite/hypotenuse
cos x = adjacent/hypotenuse
tan x = opposite/adjacent
16
Q
Probability
A
Number of desired outcomes / number of total outcomes
