area formula's
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A=(3.14) r2
area of a circle
A= bh
area of a parallelagram
A=lw
area of a rectangle
A= 1/2 (3.14) r2
area of a semicircle
A= 1/2 h(B1+B2)
area of a trapezoid
A= 1/2 bh
area of a triangle
C2= A2 + B2
pythagorean theorem
V=bh or V=(3.14)r2 h
volume of a cylinder
V=bh or V=lwh
volume of a rectangular prism