Degrees
Degrees in a circle
360°
Area of a square
s2 or lw
Surface area of a cube
6s2
Volume of a cube
s3
Area of a circle
πr2
Degrees in a right angle
90°
Area of a parallelogram
bh
Surface area of a rectangular prism
2(lw+wh+lh)
Volume of a pyramid
(1/3)Bh
2πr or πd
Degrees in a straight line
180°
Area of a triangle
(1/2)bh
Surface area of a sphere
4π2
Volume of a sphere
(4/3)πr3
Pythagorean Theorem (area of a right triangle)
a2 + b2 = c2
Angles in a triangle add up to this
180°
Area of a rhombus
(1/2)d1d2
Surface area of a cylinder
2πrh + 2πr2
Volume of a cylinder
πr2h
Example of a Pythagorean triple
(3,4,5) or (5,12,13) or (7,24,25) or etc.
sin (30°)
0.5
Area of a trapezoid
(1/2)(b1+b2)h
Surface area of a cone
πr2 + πr x √r2 + h2
Volume of a cone
(1/3)πr2h
Arc length of a circle
(x/360)(2πr)