| A | B |
|---|
| If 3 sides of 1 tri are c= to 3 sides of another tri, | then the tri's are c= by SSS. |
| If 2 sides & the included < of 1 tri are c= to 2 sides & the included < of another tri, | then the tri's are c= by SAS. |
| If 2 <'s and the included side of 1 tri are c= to 2 <'s & the included side of another tri, | then the tri's are c= by ASA. |
| CPCTC | Once 2 tri's are c=, then all the other corresponding parts are c=. |
| If 2 sides of a tri are c=, | then the <'s opposite those sides are c=. |
| An equilateral tri | has three 60 degree <'s (equiangular). |
| The bisector of the vertex < in an isos tri | is perpendicular to the base at its midpoint. |
| If 2 <'s of a tri are c=, | then the sides opposite those <'s are c=. |
| If 2 <'s and a non-included side of 1 tri are c= to the corr parts of another tri, | then the tri's are c= by AAS. |
| If the hypot & a leg of 1 rt tri are c= to the corr parts of another rt tri, | then the tri's are c= by HL. |
| A median of a tri is a segment | from a vertex to the midpt of the opposite side. |
| An altitude of a tri is the perp segment | from a vertex to the line that contins the opposite side. |
| A perpendicular bisector of a segment | is perpendicular to the segment at its midpt. |
