Congruency

Describe a congruency transformation according to the mapping. \Delta ABC\ \rightarrow\Delta STU

• Reflection over y = x

• Rotation 90º ccw

• Translation (x -3, y - 7)

• Rotation 180º

Translate the blue shape to the green shape...

• T(-3, -3)

• T(3, 3)

• T(2, 3)

• T(-2, -3)

State the line of reflection.

• r_y-axis

• r_x-axis

• r_{y = x}

• r_{y = -x}

Identify the transformation from ΔABC to ΔA'B'C'.

• R₉₀º_cw

• R₉₀º_ccw

• r _y-axis

• r _x-axis

• A
• B
• C
• D

Congruent plane figures are figures that have exactly the same size and shape.

• true

• false

∠A ≅∠?

• ∠B

• ∠E

• ∠D

• ∠F

Are the triangles congruent, if yes, why?

• SSS

• SAS

• ASA

• Not Congruent

State if the two triangles are congruent.  If they are, state how you know.

• A

• B

• C

• D

Are these triangles congruent? If so, state the rule which you used to determine congruence.

• SSA

• AAS

• ASA

• Not necessarily congruent