Name That Move
This move slides a figure to a new spot without turning it.
What is a translation?
If a point moves right 3 and up 2, what kind of move is that?
What is a translation?
What line is used when reflecting a shape straight across the x-axis?
What is the x-axis?
Angles on a straight line add up to this.
What is 180°?
The sum of the angles in a triangle is always this.
What is 180°?
This move flips the figure across a line.
What is a reflection?
Translate point (2, 3) right 4 and down 1.
What is (6, 2)?
Reflect (4, 2) across the y-axis.
What is (–4, 2)?
These angles are found on opposite sides of a transversal inside two lines.
What are alternate interior angles?
A triangle has two angles that are 60° and 30°. What is the missing angle?
What is 90°?
This move turns a shape around a point.
What is a rotation?
A figure is moved from (–1, 2) to (2, 5). What are the directions of the move?
What is right 3, up 3?
If you rotate a shape 90° clockwise, what happens to the direction it faces?
What is it turns to the right one quarter turn?
Alternate interior angles are always equal when these lines are crossed by a transversal.
What are parallel lines?
A triangle has angles of 90°, 45°, and 45°. What kind of triangle is it?
What is a right isosceles triangle?
A reflection changes this direction—left becomes right.
What is orientation?
A translation is rigid because it doesn’t change this about the figure.
What is its size or shape?
What point do we rotate around in most math problems?
What is the origin (0, 0)?
If one angle is 70°, what is the alternate interior angle?
What is 70°?
If a triangle has angles 50° and 70°, what is the size of the third angle?
What is 60°?
These three moves are called "rigid transformations." Name all of them.
What are translation, rotation, and reflection?
A student translated a shape, but it got bigger. Did they do a rigid transformation?
NO
A shape rotated 180° looks like it was turned upside down. What does that do to its coordinates?
What is (x, y) becomes (–x, –y)?
Two angles form a straight line. One is 130°. What is the other?
What is 50°?
A triangle has all equal angles. What kind of triangle is it and what are the angles?
What is equilateral, 60°, 60°, 60°?