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Area of a triangle
A = ½ b x h
the Pythagorean theorem
a² + b² = c² (can be only used on right triangles)
Area of a circle
A = 3.14 r²
circumference of a circle
c = 3.14d or c = 2(3.14)r
perimeter of a square
P = 4s (s +s +s +s)
Area of sqaure
A= s x s, A = s²
perimeter of a rectangle
p = 2w + 2L
area of rectangle
A = L x W
Area of a parallelogram
A= bh
volume of a rectangular prism (boxes)
v = L x w x h
volume of a cylinder
v = (area of circle) 3.14r² x h
slope of a line
m= y2 - y1/x2 - x1