Chapter 6- Notecards Flashcards
63 polygon interior angle sum
sum of measures of interior angles of a convex n-gon is (n - 2) * 180
64 corollary (polygon interior angle sum)
measure of an int angle of a regular n-gon is (180 * (n - 2))/n
65 exterior angle sum of a polygon
the sum of the measures of the exterior angles of a convex polygon, one of each vertex, is 360
66 diagonals of a kite
diagonals of a kite are perpendicular
67 isosceles trapezoid base angles
in an isosceles trapezoid, each pair of base angles is congruent
68 diagonals of isosceles trapezoid
the diagonals of an isosceles trapezoid are congruent
69 trapezoid midsegment theorem
in a trapezoid, the midsegment is ll to both bases, and its length is the avg of the bases’ lengths
70 llogram opp side
opp sides are congruent in a llogram
71 consecutive angles of a llogram
each pair of consecutiv int angles is supplementary
72 opp angles of a llogram
opp angles of a llogram are congruent
73 diagonals of a llogram
diagonals of a llogram bisect each other
74 conv of opp side of llogram
if both pairs of opp sides are congruent, then the 4drilateral is a llogram
75 conv of consecutive angles of llogram
if an angle of a 4drilateral is supplementary to both of its consecutive angles, then the 4drilateral is a llogram
76 conv of opp angles of a llogram
if opp angles of a 4drilateral are congruent, then the 4drilateral is a llogram
77 conv of diagonals of a llogram
if the diagonals of a 4drilateral bisect each other, then it is a llogram
78 opp sides ll and congruent
if one pair of opp sides is both congruent and ll, then the quadrilateral is a llogram
79 diagonals of a rhombus
if a 4drilateral is a rhombus, then its diagonals are T bisectors of each other
80 diagonals of a rectangle
if a llogram is a rectangle, then its diagonals are congruent
81 diagonals of a llogram (rhombus)
if diagonals of a llogram are T, then the llogram is a rhombus
82 conv of diagonals of a rhombus are angle bisectors
if a diagonal of a llogram bisects 2 opp angles of the llogram, then the llogram is a rhombus
83 conv to the diagonals of a rectangle thrm
if diagonals of a llogram are congruent, then the llogram is a rectangle