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9 Cards in this Set
 Front
 Back
rectangle

4 right angles
Diagonals bisect each other Diagonals are congruent A=bh 

square

4 congruent sides
Diagonals bisect opposite angles Diagonals are congruent Diagonals are perpendicular A=s (squared) 

triangle

306090 hyp=short(2)...long=short(root3)
454590 hyp=leg(root2) SOH CAH TOA A=1/2bh 

parallelogram

opposite sides are congruent and parallel
opposite angles are congruent consecutive angles are supplementary A=bh 

rhombus

4 congruent sides
Diagonals are perpendicular bisectors Diagonals bisect angles A=1/2d1d2 A=bh 

trapeziod

One pair of parallel sides
Median = 1/2(B1 + B2) A=1/2h(B1 + B2) A=hm 

kite

2 Consecutive sides congruent (but not all 4)
1 Diagonal is the perpendicular bisector of the others A=1/2D1D2 

regular polygon

has congruent sides and congruent angles
Radius is from center to vertex (bisects angle) Apothem is from center perpendicular to midpoint of a side A=1/2ap Int angle=(n2)180/n Ext angle=360/n 

Circle

d=2r mArc=mcentralangle
lenth arc= fraction of circumference sector  pie piece (arc and 2 radii) segment  arc and chord A=pie r squared C=2 pie r Asector=central angle/360(pie r squared) A segment= A sector  Area triangle length of arc= central angle/360(2 pie r) 