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Formulas
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Geometry formulas
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1
Formula for mass of a solid or liquid
D=M/V
M=DV
2
Formula for the volume of a cylinder
Pi r^2
V=pi r^2 • h
3
Sum of all 3 interior angles of a triangle
180
360
250
90
4
Sum of all 4 interior angles of a quadrilateral
360
180
90
250
5
Formula for pythagorean theorem
a^2+b^2-c^2
a^2+b^2=c^2 or c^2=a^+b^2
6
What is the formula for the value of an interior angle of a regular polygon?
180 (n-2)/n
A=pi r^2
360/n
7
What is the formula for the sum of interior angles of any polygon?
S=360°
S=180(n-2) or (n-2)-180
8
Whats the formula for the area of a parallelogram?
A=l•w
A=b•h
9
Formula for surface area of a sphere
S.A=4 pi r^2
Pi r^2
10
What is the formula for midpoint between two points
S=180 (n-2) or (n-2)-180
M (x1+x2/2, y1+y2/2)
11
Formula for the volume of a rectangular prism
V=L•W•H
V=pi r^2 •h
12
Formula for circle - area of a sector (if the measure of the sector is in degrees)
A=r^2 o /2
A=m/360 • pi r^2
13
What is the formula for slope of a line formed by two points?
M (x1+x2/2, y1+y2/2)
M = y2-y1/x2-x1
14
Formula for the area of a trapezoid?
A=(b1 + b2) h /2
A=bh/2
15
Whats the formula for the circle-area of a sector (if the measure of the sector is in radians)
S=r o
A=r^2 o/2
16
Formula for the area of a triangle
A=b•h
A=bh/2
17
What is the formula for the area of a circle?
A=pi r
A=pi r^2
18
What is the formula for the partition of a line segment?
X=x1+k (x2-x1)
Y=y1+k (y2-y1)
19
Formula for density of a solid or liquid
D=M/V
V=M/D
20
Formula for area of an equilateral triangle
A=bh/2
A=S^2 square root of 3 /4
21
Whats the formula for area of a rectangle?
A=l•w
A=b•h
22
Formula for surface area of a rectangular prism
S.A=L•w
S.A=2•L•W+2•L•H+2•W•H
23
What is the formula for the value of an exterior angle of a regular polygon?
S=360°
360/n
24
Formula for the volume of a solid or liquid
D=M/V
V=M/D
25
Sum the 2 acute angles of a right triangle
250
360
180
90
26
Formula for volume of a sphere
V=4 pi r^2/3 or V=4/3 pi r^3
S.A= 4 pi r^2
27
What is the formula for the circumference of a circle?
A=pi r^2
C=2 pi r or c=pi d
28
Formula for circle - area of the arc (if the measure of the arc is in radians)
V=m/d
S=r o
29
Formula for Euler's Theorem
F+V=E+2
M=DV
30
Whats the formula for population density?
Pop.density=b•h
Pop.density=population/land area
31
Formula for circle - length of the arc (if the measure of the arc is in degrees)
L=pi r^2
L=m/360 • 2 pi r
32
Whats the formula for the distance between two points?
D=square root of (x2-x1)^2 + (y2-y1)^2
M=y2-y1/x2-x1
M (x1+x2/2, y1+y2/2
S=180 (n-2) or (n-2)-180
