Always, Sometimes, Never
Equilateral triangles are isosceles
always
a right angle has a supplement
always
an obtuse angle has a supplement
always
both angles in a complementary pair are acute
always
equilateral triangles are equiangular
always
if a line is parallel to one of two parallel lines then it is parallel to the other
always
if two angles are right angles then they are congruent
always
parallel lines are coplaner
always
perpendicular lines form right angles
always
right angles are congruent
always
the acute angles in a right triangle are complementary
always
the exterior angle of a triangle is larger than either of the two remote interior angles
always
the exterior angle of a triangle is supplementary to one of the interior angles
always
two points determine a line
always
a right angle has a complement
never
a triangle can have 2 right angles
never
a triangle contains two right angles
never
both angles in a supplementary pair are obtuse
never
diagnols of a kite are perpendicular bisectors of each other
never
diagnols of isosceles trapezoid are perpendicular
never
if a is perpendicular to b and b is perpendicular to c then a perpendicular to c
never
perpendicular lines can be assumed from a diagram
never
right triangles are obtuse
never
right triangles are obtuse triangles
never
scalene triangles are isosceles
never
skew lines are parallel
never
the acute angles of a right triangle are supplementry
never
a pair of congruent angles is right angles
sometimes
a pair of vertical angles is supplementary
sometimes
a rectangle has diagnols that bisect the opposite angles
sometimes
alternate exterior angles are complementary
sometimes
alternate interior angles are supplementary
sometimes
an exterior angle is a triangle is larger than any interior angle in the triangle
sometimes
both angles in a supplementary pair are right
sometimes
complementary pairs are adjacent
sometimes
coplaner lines are parallel
sometimes
corresponding angles are congruent
sometimes
if AX=XB then X is the midpoint of AB
sometimes
if two angles are complementary then they form a right angle
sometimes
if two angles are congruent then they are right angles
sometimes
if two angles are supplementary then they form a linear pair
sometimes
if two angles are supplementary they they form a straight angle
sometimes
if two lines are perpendicular to a third line then they are parallel to each other
sometimes
isosceles triangles are equilangular
sometimes
isosceles triangles are equilateral
sometimes
obtuse triangles are isosceles
sometimes
right triangles are isosceles
sometimes
supplementary angles from a straight line
sometimes
three points determine a plane
sometimes