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Area Formulas

AB
bharea of rectangle or parallelogram
1/2 bharea of triangle
1/2d1d2area of rhombus
1/2h(b1 +b2)area of trapezoid
1/2 Paarea of regular polygon
3.14 r2area of a circle
s2 or bharea of square
1-- 1 -- sq.rt 2ratio of sides of a 45-45-90 triangle
1 -- sq.rt 3 -- 2ratio of sides of a 30-60-90 triangle
opposite/adjacenttan
opposite/hypotenusesin
adjacent/hypotenusecos
360degrees in a circle
.3737% probability
apothemdistance from center to midpoint of a side in a regular polygon
radius1/2 of a diameter


Health Sciences Counselor
Southside Virginia Community College
VA

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