Congruence And Similarity Flashcards
Definition of congruent shapes
Shapes are congruent (identical) if their angles and their sides rotate reflect translate.
SSS
Side, side, side
Sides are the same length
SAS
Side, angle, side
The same angle between two same side lengths
ASA
AAS
SAA
Angle, side, angle
To same size angles and the same size length
RHS
Right (angled triangle) hypotenuse, side.
Oh right angle and two same side lengths one of them hypotenuse.
Square scale factor to get area scale factor
Key information
To shapes of them a lot if they are …
Two shapes of similar if they are the same shape but different size
Angles are the same
Lengths are different
One is an enlargement of the other therefore there is a scale factor all sides times by scale factor