1
Q
area of a rectangle
A
A = l • w
2
Q
perimeter of a rectangle
A
P = 2l + 2w
3
Q
volume of a rectangular prism
A
V = l • w • h
4
Q
area of a parallelogram
A
A = l • h
5
Q
area of a triangle
A
A = 1/2bh
6
Q
pythagorean theorem
A
a^2 + b^2 = c^2
7
Q
isosceles right triangle
A
- always has a 90 degree and two 45 degree angles
- the side lengths are determined by the formula: x, x, x√2
8
Q
30, 60, 90 triangle
A
- side lengths are determined by the formula: x, x√3, and 2x
9
Q
area of a trapezoid
A
area = {[(parallel side a + parallel side b) / 2] • h}]
10
Q
area of a circle
A
area = πr2
11
Q
area of a sector
A
area = (πr^2)[degree measure of center of (arc/360)]
12
Q
circumference
A
circumference = 2πr circumference= πd
13
Q
equation of a circle
A
(x − h)^2 + (y − k)^2 = r^2
14
Q
volume of a cylinder
A
volume = πr2h
ACT math
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