postulate and theorem Flashcards
(20 cards)
[p] through any 2 points….
there is exactly one line
[p] if 2 lines intersect….
then they intersect in exactly one point
[p] if 2 planes intersect…
then they intersect in exactly one line
[p] through any 3 non-collinear point…
there is exactly one plane
corresponding angles [p]
[p] if a transversal intersects 2 parallel lines, then corresponding angles are congruent
alternate interior angles [t]
if a transversal intersects 2 parallel lines, then they are congruent
same side interior angles [t]
if a transversal intersects 2 parallel lines, then they are supplementary
alternate exterior angles [t]
if a transversal intersects 2 parallel lines, then they are congruent
same side exterior angles [t]
if a transversal intersects 2 parallel lines, then they are supplementary
converse of the corresponding angle [p]
if 2 lines and a transversal form corresponding angles that are congruent, then the lines are parallel
converse of the alternate interior angles [t]
if 2 lines and a transversal form alternate interior angles that are congruent, then the lines are parallel
converse of the same side interior angles [t]
if 2 lines and a transversal form same side interior angles that are congruent, then the lines are parallel
converse of the alternate exterior angles [t]
if 2 lines and a transversal form alternate exterior angles that are congruent, then the lines are parallel
converse of the same side exterior angles [t]
if 2 lines and a transversal form same side exterior angles that are congruent, then the lines are parallel
[t] if 2 lines are parallel to the same line…
then they’re parallel to each other
[t] in a plane, if 2 lines are perpendicular to the same line….
then they’re parallel to each other
[t] in a plane, if a line is perpendicular to one of 2 parallel lines….
then it’s also perpendicular to the other
triangle angle-sum [t]
sum of the measures of the angles of a triangle is 180
SSS
if the 3 sides of one triangle is equal to the 3 sides of anther triangle, then the 2 are congruent
HL
hypotenuse-leg.
if the hypotenuse and a leg of one right triangle are congruent to the hypotenuse and a leg of another right triangle, then they’re congruent.