Methods of proving Congruent Triangles (3)

AAS

Angle-Angle-Side If 2<'s and a nonincluded side of 1 🔺are congruent to 2 <'s and a nonincluded side of a 2nd 🔺, then the 🔺's are congruent.

ASA

Angle-Side-Angle If 2<'s and the included side of one 🔺are congruent to 2 <'s and the included side of a 2nd 🔺, then the 🔺's are congruent

HL

Hypotenuse-Leg, for right triangles only

What cannot be used as a proof

SSA, AAA

SAS

Side-Angle-Side If 2 sides and the included < of one triangle are congruent to 2 sides and the included < of a 2nd 🔺, then the 🔺's are congruent

SSS If 3 sides of 1 triangle are congruent to 3 sides of 2nd triangle

Then they are congruent Side-Side-Side