Mathcounts Formulas

Mathcounts Formulas zt

PERIMETER

Triangle p = a + b +c

Square p = 4s

Rectangle p = 2L + 2W

Circlec = 2πr

c = πd

Regular Polygon p = ns


AREA

Triangle A = 1/2 bh

Square A = s^2

RectangleA = LW

Parallelogram A = bh

Trapezoid A = ½(b1 +b2)h

Circle A = πr2

Regular Polygon A = ½ ap

OvalA = πab (a = height, b = width)


LATERALSURFACE AREA

Rectangular Prism L = (2 l + 2 w)h

CircularCylinder L = 2πrh



TOTAL SURFACE AREA

Cube T =6e2

Rectangular Prism T = 2 l w + 2 l h + 2 w h

CircularCylinder T = 2πr2 + 2πrh

Sphere S = 4πr2

Cone S =πrl (l is the slant height)


VOLUME

CubeV = e3

Rectangular Prism V = l w h

Circular Cylinder V= π r2h

Circle Cone V = 1/3 πr2h

Pyramid V = 1/3bh

Sphere V = 4/3 π r3

Regular tetrahedron V = √2s3/12