Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
21 Cards in this Set
- Front
- Back
complementary angles
|
two angles whose sum is 90˚
|
|
supplementary angles
|
two angles whose sum is 180˚
|
|
vertical angles
|
opposite angles formed by intersecting lines; are always congruent
|
|
congruent angles
|
angles with the same measure
|
|
isosceles triangle
|
must have at least two congruent sides and angles
|
|
equilateral triangle
|
all sides (and angles) are congruent; angles measure 60˚
|
|
equiangular triangle
|
all angles (and sides) are congruent; angles measure 60˚
|
|
convex polygons
|
a polygon whose diagonals connecting any two vertices are inside the polygon
|
|
concave polygon
|
a polygon with at least one diagonal connecting two vertices that is outside the polygon (at least one pair of sides appear to "cave" in)
|
|
regular polygon
|
a polygon with all congruent sides and angles
|
|
similar triangles
|
triangles with the corresponding angle measures but lengths of sides differ
|
|
indirect measurement
|
finding missing measurements using similar figures or without measuring
|
|
perpendicular lines
|
intersecting lines that form 90˚angles
|
|
parallel lines
|
nonintersecting lines that are equidistant in the same plane
|
|
transversal
|
a line that intersects one or more lines
|
|
interior angles
|
angles formed inside parallel lines when cut by a transversal
|
|
exterior angles
|
angles formed outside parallel lines when cut by a transversal
|
|
alterante interior angles
|
congruent angles inside the parallel lines that are on opposite sides of the transversal and opposite position of the parallel lines
|
|
alternate exterior angles
|
congruent angles outside the parallel lines that are on opposite sides of the transversal and opposite position of the parallel lines
|
|
corresponding angles
|
congruent angles found on the same side of the transversal and same position relative to the parallel lines
|
|
sum of interior angles formula
|
S = 180(n - 2)
|