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10 Cards in this Set

  • Front
  • Back
Midpoint Thm
If M is the midpoint of segment AB, then
2AM=AB and AM=1/2AB
2MB=AB and MB=1/2AB
Angle bisector thm
If ray BX is the bisector of ∠ABC, then
2m∠ABX=m∠ABC; m∠ABX=1/2m∠ABC
2m∠XBC=m∠ABC; m∠XBC=1/2m∠ABC
Vertical Angle thm
vertical ∠'s are congruent
Vertical Angle thm
If angles are vertical, then they are congruent.
If two lines are perpendicular,
then adjacent ∠'s are congruent.
If two lines form congruent adjacent ∠'s,
then the lines are perpendicular
If the exterior sides of two adjacent acute ∠'s are perpendicular,
then the ∠'s are complementary.
Congruent Supplement thm
If 2 ∠'s are supplements of congruent ∠'s (or the same ∠), then the 2 ∠'s are congruent.
Congruent complement thm
If 2 ∠'s are complements of congruent ∠'s (or the same ∠), then the 2 ∠'s are congruent.
If 2 parallel planes are cut by a third plane,
then the lines of intersection are ||.