Transformations, Symmetry & Congruence

What does it mean for two shapes or triangles to be congruent?

Identical in shape and size.

What does the SSS condition for triangle congruence stand for?

Side-Side-Side (3 equal sides).

What does the SAS condition for triangle congruence stand for?

Side-Angle-Side (2 sides and included angle).

What does the ASA condition for triangle congruence stand for?

Angle-Side-Angle (2 angles and included side).

What does the RHS condition for triangle congruence stand for?

Right-angle, Hypotenuse, Side.

What is meant by the order of rotational symmetry?

Number of times a shape fits on itself in 360°.

How do you perform and describe a translation?

Vector (top = left/right, bottom = up/down).

How do you perform and describe a reflection?

Mirror line equation (e.g. x = 2, y = x).

What 3 details are needed to fully describe a rotation?

Angle, direction, centre of rotation (x, y).

What 2 details are needed to fully describe an enlargement?

Scale factor k, centre of enlargement (x, y).

What is a combination of transformations?

Sequential transformations done step-by-step.