Unit one Flashcards
A portion of a line consisting of an initial point and all the points lying to one side of that point is called a ________.
Ray
Two lines intersect in a _________________.
intersection
A/an ________________________ is a mathematical statement that is accepted without proof
Undefined term
If a ray divides an angle into two congruent angles, then the ray is called a/an _________________.
segment bisector
Two angles that have the same measure are called ____________________.
congruent angles
An angle whose measure is greater than 90 degrees and less than 180 degrees is called _____________.
obtuse angle
Two angles whose measures total 90 degrees are ________________________________.
complementary
When two lines intersect, they form two pairs of nonadjacent, opposite angles. These angles are called ___________________________________.
Vertical angles
Two angles whose measures total 180 degrees are _________________________________.
supplementary
If two angles share a vertex and a side but have no interior points in common, the angles are said to be ________________________.
adjacent angles
m∠CBD+m∠DBA=m∠CBA is the mathematical representation of the ________________________________ postulate.
Angle addition postulate
Adjacent angles are . . .
two angles that share a common vertex (a point where two lines meet) and a common side (a line segment that both angles touch), but they do not overlap.
Linear pair
a pair of adjacent, supplementary angles
Regular polygon
Has equal sides and equal interior angles
Irregular polygon
not all sides or interior angles are equal
Equilateral polygon
all sides are equal
Equiangular polygon
all interior angles are equal
triangle
polygon with three sides
quadrilateral
polygon with 4 sides
pentagon
polygon with 5 sides
hexagon
6 sides
convex polygon
all interior angles are less than 180
concave polygon
at least one interior angle is more than 180
what is the distance formula?
d={square root} (x2-x1) {squared}+(y2-y1){squared}
