geometry formulas Flashcards
1
Q
area of a triangle
A
1/2bh
2
Q
area of a square
A
s²
3
Q
perimeter of a square
A
4s
4
Q
area of a rectangle
A
lw
5
Q
perimeter of a rectangle
A
2l + 2w
6
Q
area of a circle
A
πr²
7
Q
circumference of a circle
A
2πr
8
Q
area of a parallelogram
A
bh
9
Q
area of a trapezoid
A
1/2h (b1 + b2)
10
Q
volume of a rectangular prism
A
lwh
11
Q
surface area of a rectangular prism
A
2lw + 2lh + 2wh
12
Q
volume of all other prisms
A
Bh
13
Q
surface area of all other prisms
A
hp + 2B
14
Q
volume of a pyramid
A
1/3 Bh
15
Q
surface area of a pyramid
A
1/2 lp + B
16
Q
volume of a cylinder
A
πr²h
17
Q
surface area of a cylinder
A
2πr² + 2πrh
18
Q
volume of a cone
A
1/3 πr²h
19
Q
surface area of a cone
A
πr² + πrl
20
Q
volume of a sphere
A
4/3πr^3
21
Q
surface area of a sphere
A
4πr²
22
Q
volume of a hemisphere
A
2/3πr^3
23
Q
surface area of a hemisphere
A
3πr²
24
Q
how to find the area of a sector
A
(x * πr²) / 360
