the length of a segment is _____ negative
never
if point S is between R and V, then S _____lies on Line RV
always
a coordinate can _____ be paired with a point on a number line
always
a bisector of a segment is _____ a line
sometimes
a ray _____ has a midpoint
never
congruent segments _____ equal lengths
always
Ray AB and Ray BA _____ denote the same ray
never
two points _____ lie in exactly one line
always
three points _____ in exactly one plane
sometimes
three points _____ lie in exactly one line
sometimes
three collinear points _____ lie in exactly one plane
never
two planes _____ intersect
sometimes
two intersecting planes _____ intersect in exactly one point
never
two intersecting lines _____ lie in exactly one point
always
two lines _____ intersect in exactly one point
sometimes
a line and a point not on that line _____ lie in more than one plane
never
a line _____ contains exactly one point
never
when A and B are in a plane, Line AB is _____ in that plane
always
an angle forming a linear pair with a right angle is also a right angle
always
two angles of a linear pair are both acute angles
never
two angles of a linear pair are both right angles
sometimes
a pair of supplementary angles are adjacent to each other
sometimes
a pair of supplementary, vertical angles are right angles
always
two acute angles are supplementary
never
two vertical angles are supplementary
sometimes
two angles of a linear pair are supplementary
always
two angles of a linear pair are complementary
never
two lines in the same plane _____ parallel
sometimes
two lines in the same plane are _____ skew
never
two noncoplanar lines _____ intersect
never
a line and a plane _____ have exactly one point of intersection
sometimes
it two planes do not intersect, then they are _____ parallel
always
if two lines are cut by a transversal then the three lines are _____ coplanar
always
two lines that are not parallel are _____ skew
sometimes
two skew lines are _____ parallel
never
two parallel lines are _____ coplanar
always
a line in the plane of the ceiling and a line in the plane of the floor are _____ parallel
sometimes
two lines in the plane of the floor are _____ skew
never
if a line is parallel to a plane, a plane containing that line is _____ parallel to the given plane
sometimes
two lines parallel to the same plane are _____ parallel to each other
sometimes
two lines parallel to a third line are _____ parallel to each other
always
two planes parallel to the same line are _____ parallel to each other
sometimes
when there is a transversal of two lines, the three lines are _____ coplanar
always
skew lines _____ intersect
never
two planes parallel to the same plane are _____ parallel to each other
always
two lines skew to a third line are _____ skew to each other
sometimes
two lines perpendicular to a third line are _____ skew to each other
sometimes
through a point outside a plane there is _____ more than one line parallel to the plane
always
if a line intersects one of two parallel lines, then it _____ intersects the other line also
sometimes
skew lines are _____ coplanar
never
two intersecting lines _____ lie in exactly one plane
`always
if two planes are each parallel to the same line, then the two planes are _____ parallel to each other
sometimes
corresponding angles are _____ congruent
sometimes
if two lines are parallel, then the same side interior angles are _____ congruent
sometimes
when a transversal intersects two lines, four parts of congruent corresponding angles are _____ formed
sometimes
a line is parallel to plane M and intersects plane N in one point. Plane M and N are parallel
never
same-side interior angles are _____ congruent
sometimes
if two angles are supplementary then they form a linear pair
sometiems
two lines perpendicular to a third line are _____ perpendicular to each other
sometimes
two lines cut by a transversal are _____ coplanar
always
two intersecting lines are _____ coplanar
always
if two lines are cut by a transversal then alternate interior angles are _____ congruent
sometimes
a triangle has three perpendicular bisectors
always
a perpendicular bisector is a segment drawn perpendicular from a vertex of a triangle to the opposed side at its midpoint
sometimes
an altitude can be located on the triangle itself
sometimes
a circumcenter is an orthocenter
sometimes
a median is in the interior of a triangle
always
a median of a triangle is a segment bisector
always
three lines intersecting in one point are _____ coplanar
sometimes
two lines that are not coplanar _____ intersect
never
two planes parallel to the same line are _____ parallel
sometimes
lines in two parallel planes are _____ parallel to each other
sometimes
two lines that do not intersect are _____ parallel
sometimes
two skew lines _____ intersect
never
two; lines parallel to a third line are _____ parallel
always
if a line is parallel to plane X and also to plane Y, then plane X and plane Y are _____ parallel
sometimes
plane X is parallel to plane Y. if plane Z intersects X in line k and Y in line n, then k is _____ parallel to n
always
if a triangle is isosceles, then it is _____ equilateral
sometimes
if a triangle is equilateral, then it is _____ isosceles
always
if a triangle is scalene, then it is _____ isosceles
never
if a triangle is obtuse, it is _____ intersect
sometimes
the sum of the measures of the exterior angles of any convex polygon, one angle at each vertex, is _____ 360
always
a segment joining two vertices of a polygon is _____ a diagonal
sometimes
the sum of the measures of the interior angles of a convex polygon is _____ 360
sometimes
the sum of the measures of the exterior angles of a polygon _____ depends on the number of sides of the polygon
never
a regular polygon is _____ equilateral
always
an equiangular polygon _____ regular
sometimes
if a triangle is obtuse, then it is _____ isosceles
sometimes
each side of a polygon _____ intersects exactly two other sides of the polygon
always
a regular hexagon _____ has a right angle
never
a regular polygon is _____ convex
always
a figure with three sides is _____ a concave triangle
never
each exterior angle of an equiangular n-sided polygon _____ acute
sometimes
perpendicular lines _____ form 60� angles
never
two lines are perpendicular if and only if they _____ form congruent adjacent angles
always
if the exterior sides of two adjacent angles are perpendicular, then the angles are _____ supplementary
never
perpendicular lines _____ sometimes lie in the same plane
sometimes
a scalene triangle is _____ an obtuse triangle
sometimes
a right triangle _____ has two acute angles
always
a regular polygon is _____ equiangular
always
in a convex n-gon, the sum of measures of the exterior is _____ 540
never
if a polygon is equiangular, then it is _____ equilateral
sometimes
a triangle that is isosceles is _____ equilateral
sometimes
the acute angles of a right triangle is _____ equilateral
sometimes
an equiangular triangle is _____ equilateral
always
the measure of an exterior angle of a triangle is _____ greater than the measure of either of its remote interior angles
always
an acute triangle is _____ congruent to an obtuse triangle
never
a polygon is _____ congruent to itself
always
a right triangle _____ congruent to another right triangle
sometimes
If triangle ABC ? triangle XYZ, ?A is _____ congruent to ?Y
sometimes
if triangle ABC ? triangle XYZ, ?B is _____ congruent to ?Y
always
if triangle ABC ? triangle XYZ, segment AB is _____ congruent to segment YZ
sometimes