Quadrilaterals Flashcards
(26 cards)
non-simple curve
no intersection point
simple curve
does not cross itself. opened and closed
open curve
starting and ending point do not coincide
closed curve
coinciding start and ending point
interior
inside of closed curve
exterior
outside of closed curve
on the curvw
points on the border of the curve
polygons
simple closed curves made of straight line segments
diagonals
join 2 opposite vertices
diagonals formula
n x (n-3)/2
interior angles
angles inside the polygon
interior angles formula
(n-2) x 180
regular polygon
all angles and sides are equal
irregular polygon
all angles and sides are not equal
equilateral
all sides are equal
equiangular
all angles are equal
convex
all angles are less than 180
concave
1 angle is more than 180
parallel
two lines that wont meet
transversal
line that crosses 2 parallel lines
corresponding angles
angles on same side of transversal. 1 is in interior and 1 is in exterior
alt. int. ang.
equal. inside parallel lines. on alternate sides of transversal
alt. ext. ang.
exterior. alt. sides of transversal. equal.
vertically opp angles
opp to eachother. equal.
