Congruent Triangles (Unit 3a)

What is congruency?

• Same size and shape

• Same size

• Similar

• Same shape

The symbol for congruence is ______

• =
• ≅
• ≈
• ⋍

A rigid motion ...

• preserves size and location
• preserves shape and location
• preserves size and shape
• makes the figure larger

Figures that are same size, same shape and same angles are...

• Congruent

• Image

• Angles

• Similar

Matching angles are called

• Corresponding Sides
• Corresponding Angles
• The Same
• Congruent Angles

Matching sides are called

• Corresponding Sides
• Corresponding Angles
• The Same
• Congruent Sides

A type of transformation where a figure is “flipped” over a line of symmetry. A reflection produces a mirror image of a figure.

• rotation
• translation
• dilation
• reflection

A slide is also called a _________.

• Translation
• Reflection
• Rotation
• Transformation

What does a translation do to an image?

• Turns it 90* clockwise
• Mirrors it
• Shrinks it
• Slides it

Identify the transformation from ABC to A'B'C'.

• Reflection across the x-axis
• Reflection across the y-axis
• 90^o clockwise rotation
• 90^o counterclockwise rotation