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38 Cards in this Set
- Front
- Back
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triangle
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3 sides
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quad
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4
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pentagon
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5 sides
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hexagon
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6 sides
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heptagon
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7 sides
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octagon
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8 sides
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nonagon
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9 sides
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decagon
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10 sides
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11-gon
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11 sides
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dedagon
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12 sides
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concave
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at least one of the diagonals is outside the shape
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convex
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all diags inside
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regular polygon
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all sides and angles are congruent
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3 sides
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180 degrees
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4 sides
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360 degrees
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5 sides
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540 degrees
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6 sides
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720 degrees
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sum of interior angles thm
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(n-2)180
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each interior angles
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(n-2)180)/n
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sum of exterior angles thm
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360 total for all exterior angles
Each individual exterior angle of an n-gon is 360/n |
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its a parallelogram if...
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opps angles and sides are congruent
consec angles are supp diags bisect each other |
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its a parallelogram if...
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opps sides of a quad are ll
both pairs of opp sides are congruent both pairs of opp angles are congruent supp to both of its consec angles diags bisect each other |
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rectangle
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quad with 4 right angles
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rectangle thm
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the diags are congruent
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rhombus
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a quad with 4 congruent sides
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rhombus thm
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the diags are perpendicular
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square
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a quad with 4 congruent sides and angles
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conditions for rectangle
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if 1 angle is a right angle
if the diags are congruent |
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conditions for rhombus
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1 pair of consec sides
diags are perpendicular diags bisect opp angles |
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kite
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a quad with exactly 2 pairs of congruent sides
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kite thm
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diags are perpendicular
exactly 1 pair of opps angles are congruent |
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trapezoid
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a quad with exactly 1 pair of parallel sides
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isosceles trapeziod thm
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1 pair of congruent base angles
(Both pairs are congruent, one needed to qualify diags are congruent |
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bases
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two parallel sides
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legs
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the non-parallel sides
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base angles
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the 2 angles on either end of the base
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isosceles
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has congruent legs and base angles
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midsegment
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segment connecting midpoints of both legs
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