galileo

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Remember to label areas with "square units".
areatri
Area (all triangles)
areatri
areaequitri
Area (equilateral triangle)
areaeqitri
arearect
l = length and w = width may also be used
Area (rectangle)
areabh
arealw
areasq
Area (square)

areasq

areapar
Area (parallelogram)

areapara

areatrap
Area (trapezoid)

areatr
arearh
d1 = diagonal 1; d2 = diagonal 2

Area (rhombus)

arearho
Area can also be calculated with A = bh.

areacir
Area (circle)
areac
Area of sectors of a circle
(Sectors are like "pizza" pie slices of a circle.)
areaChalf
Semi-circle
(half of circle = half of area)
areaCh
areaCquart
Quarter-circle
(¼ of circle = ¼ of area) areaCq
areaCarc
Any Sector
(fractional part of the area)
areaCs
n = degrees in central angle of sector
areapolys
FYI
Topic :
areapoly
Regular polygons have all sides of equal length.
a = apothem
p = perimeter

 

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