Sometimes, Always, Never Geometry

if a line intersects one of two parallel lines, then it _____ intersects the other line also

sometimes

if a line is parallel to a plane, a plane containing that line is _____ parallel to the given plane

sometimes

if a line is parallel to plane X and also to plane Y, then plane X and plane Y are _____ parallel

sometimes

if a triangle is isosceles, then it is _____ equilateral

sometimes

if a triangle is obtuse, it is _____ intersect

sometimes

if a triangle is obtuse, then it is _____ isosceles

sometimes

if two lines are cut by a transversal then alternate interior angles are _____ congruent

sometimes

if two lines are parallel, then the same side interior angles are _____ congruent

sometimes

if two planes are each parallel to the same line, then the two planes are _____ parallel to each other

sometimes

lines in two parallel planes are _____ parallel to each other

sometimes

perpendicular lines _____ sometimes lie in the same plane

sometimes

same-side interior angles are _____ congruent

sometimes

the sum of the measures of the interior angles of a convex polygon is _____ 360

sometimes

three lines intersecting in one point are _____ coplanar

sometimes

three points _____ in exactly one plane

sometimes

three points _____ lie in exactly one line

sometimes

two angles of a linear pair are both right angles

sometimes

two lines _____ intersect in exactly one point

sometimes

two lines in the same plane _____ parallel

sometimes

two lines parallel to the same plane are _____ parallel to each other

sometimes

two lines perpendicular to a third line are _____ perpendicular to each other

sometimes

two lines perpendicular to a third line are _____ skew to each other

sometimes

two lines skew to a third line are _____ skew to each other

sometimes

two lines that are not parallel are _____ skew

sometimes

two lines that do not intersect are _____ parallel

sometimes

two planes _____ intersect

sometimes

two planes parallel to the same line are _____ parallel

sometimes

two planes parallel to the same line are _____ parallel to each other

sometimes

two vertical angles are supplementary

sometimes

when a transversal intersects two lines, four parts of congruent corresponding angles are _____ formed

sometimes

two intersecting lines _____ lie in exactly one plane

`always

a coordinate can _____ be paired with a point on a number line

always

a median is in the interior of a triangle

always

a median of a triangle is a segment bisector

always

a pair of supplementary, vertical angles are right angles

always

a regular polygon is _____ convex

always

a regular polygon is _____ equiangular

always

a regular polygon is _____ equilateral

always

a right triangle _____ has two acute angles

always

a triangle has three perpendicular bisectors

always

an angle forming a linear pair with a right angle is also a right angle

always

congruent segments _____ equal lengths

always

each side of a polygon _____ intersects exactly two other sides of the polygon

always

if a triangle is equilateral, then it is _____ isosceles

always

if point S is between R and V, then S _____lies on Line RV

always

if two lines are cut by a transversal then the three lines are _____ coplanar

always

it two planes do not intersect, then they are _____ parallel

always

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

the sum of the measures of the exterior angles of any convex polygon, one angle at each vertex, is _____ 360

always

through a point outside a plane there is _____ more than one line parallel to the plane

always

two angles of a linear pair are supplementary

always

two intersecting lines _____ lie in exactly one point

always

two intersecting lines are _____ coplanar

always

two lines are perpendicular if and only if they _____ form congruent adjacent angles

always

two lines cut by a transversal are _____ coplanar

always

two lines parallel to a third line are _____ parallel to each other

always

two parallel lines are _____ coplanar

always

two planes parallel to the same plane are _____ parallel to each other

always

two points _____ lie in exactly one line

always

two; lines parallel to a third line are _____ parallel

always

when A and B are in a plane, Line AB is _____ in that plane

always

when there is a transversal of two lines, the three lines are _____ coplanar

always

Ray AB and Ray BA _____ denote the same ray

never

a figure with three sides is _____ a concave triangle

never

a line _____ contains exactly one point

never

a line and a point not on that line _____ lie in more than one plane

never

a line is parallel to plane M and intersects plane N in one point. Plane M and N are parallel

never

a ray _____ has a midpoint

never

a regular hexagon _____ has a right angle

never

if a triangle is scalene, then it is _____ isosceles

never

if the exterior sides of two adjacent angles are perpendicular, then the angles are _____ supplementary

never

perpendicular lines _____ form 60° angles

never

skew lines _____ intersect

never

skew lines are _____ coplanar

never

the length of a segment is _____ negative

never

the sum of the measures of the exterior angles of a polygon _____ depends on the number of sides of the polygon

never

three collinear points _____ lie in exactly one plane

never

two acute angles are supplementary

never

two angles of a linear pair are both acute angles

never

two angles of a linear pair are complementary

never

two intersecting planes _____ intersect in exactly one point

never

two lines in the plane of the floor are _____ skew

never

two lines in the same plane are _____ skew

never

two lines that are not coplanar _____ intersect

never

two noncoplanar lines _____ intersect

never

two skew lines _____ intersect

never

two skew lines are _____ parallel

never

if two angles are supplementary then they form a linear pair

sometiems

a bisector of a segment is _____ a line

sometimes

a circumcenter is an orthocenter

sometimes

a line and a plane _____ have exactly one point of intersection

sometimes

a line in the plane of the ceiling and a line in the plane of the floor are _____ parallel

sometimes

a pair of supplementary angles are adjacent to each other

sometimes

a perpendicular bisector is a segment drawn perpendicular from a vertex of a triangle to the opposed side at its midpoint

sometimes

a scalene triangle is _____ an obtuse triangle

sometimes

a segment joining two vertices of a polygon is _____ a diagonal

sometimes

an altitude can be located on the triangle itself

sometimes

an equiangular polygon _____ regular

sometimes

corresponding angles are _____ congruent

sometimes

each exterior angle of an equiangular n-sided polygon _____ acute

sometimes