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9 Cards in this Set
- Front
- Back
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rectangle
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4 right angles
Diagonals bisect each other Diagonals are congruent A=bh |
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square
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4 congruent sides
Diagonals bisect opposite angles Diagonals are congruent Diagonals are perpendicular A=s (squared) |
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triangle
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30-60-90 hyp=short(2)...long=short(root3)
45-45-90 hyp=leg(root2) SOH CAH TOA A=1/2bh |
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parallelogram
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opposite sides are congruent and parallel
opposite angles are congruent consecutive angles are supplementary A=bh |
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rhombus
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4 congruent sides
Diagonals are perpendicular bisectors Diagonals bisect angles A=1/2d1d2 A=bh |
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trapeziod
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One pair of parallel sides
Median = 1/2(B1 + B2) A=1/2h(B1 + B2) A=hm |
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kite
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2 Consecutive sides congruent (but not all 4)
1 Diagonal is the perpendicular bisector of the others A=1/2D1D2 |
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regular polygon
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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=(n-2)180/n Ext angle=360/n |
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Circle
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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) |
