Meth by RD Terms

• AAA Similarity Postulate


  If the three angles of one triangle are congruent to three angles of another triangle, then the two triangles are similar
• SSS Similarity Theorem


  Two triangles are similar if the corresponding sides of two triangles are in proportion
• SAS Similarity Theorem


  Two triangles are similar if an angle of one triangle is congruent to an angle of another triangle and the corresponding sides including those angles are in proportion
• Triangle Angle-Bisector Theorem


  If a segment bisects an angle of a triangle, then it divides the opposite side into segments proportional to the other two sides
• Triangle Proportionality Theorem


  If a line parallel to one side of a triangle intersects the other two sides, then it divides those sides proportionally
• Right Triangle Similarity Theorem (RTST)


  If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other
• Pythagorean Theorem


  The square of the hypotenuse of a right triangle is equal to the sum of the squares of the legs
• Properties of a Parallelogram

  • Opposite angles are congruent
  • Consecutive angles are supplementary
  • Opposite sides are congruent
  • Diagonals bisect each other
  • A diagonal of a parallelogram divides the parallelogram into two congruent triangles