quadrilateral vocab Flashcards
pentagon
5 sides
hexagon
6sides
septagon
seven sides
octagon
8 sides
monagon
9 sides
decagon
10 sides
dodecagon
12 sides
20-agon
20 sides
convex
has no diagonal with points outside the polygon
concave
has at least 1 diagonal outside of the polygon
how to find sum of inter angle
180(n-2)
sum of ext <
360
quadrilateral
4 sided polygon
sum of int < is 360
kite
-2 pairs of consecutive sides are congruent
- diagonals are perpendicular
- longer diagonal bisects the other
- one diagonal bisects opposite angles
- one pair of opposites < congruent ( < of none = sides)
- can use pythag
trapozoids
1 pair of opposite sides are ||
midsegment
in a trapozoid
- || to bases
- length is 1/2 of the sum of 2 bases
ab+cd/2
isos trapezoid
non || sides or the legs are congruent
base < are congurent
diagonals congruent
|| - ogram
both pairs of opp sides ||
both pairs of opp sides =
opp < =
consecutive < are supp
diagonals bisect each other
rectangle
all < are RT <
diagonals =
rhombus
all sides =
diagonals bisect <
diagonals are perpendicular
square
all ||-ogram, rectangle, and rohmbus properties
how to prove a ||-ogram
1 if both pars of opp sides are ||
2 if both pairs of opp sides are =
3 if one pair of opp sides is both || and =
4 if the diagonlas bisect eachother
5 if both pairs of opp < are =
how to prove a rectangle
1 if all < are rt<s
2 if its a ||-ogram and has 1 rt <
4 if opp sides are || and = and only to its opp
how to prove rhombus
if a ||-ogram has consecutive sides =
how to prove a square
if all sides = and ||
how to prove a kite
if a quaderlateral has 2 disjoint pairs of consececutive sides =
how to prove isos trapoziod
if a trap has = non || sides
