Translation
A transformation that slides a figure without turning it
What are congruent triangles?
What are similar triangles?
Triangles that have the same shape but different sizes
What is a reflection?
A flip over a line
What is a rotation?
A turn around point
What are triangle congruence postulates?
SSS,SAS,ASA
What is a dilation?
A transformation that changes sizes but keeps shape
What is the center of rotation?
The center point of a rotation
What is the scale factor?
The ratio used in similar figures
corresponding angles in similar triangles are this
What is SAS similarity?
if two triangles have proportional sides and equal included angle
What is (x,-y)?
A reflection over the x-axis changes (x,y)to this
what is (y,-x)?
A 90 rotation clockwise around origin turns (x,y) into this
What is SSS similarity?
when all sides of two triangles are proportional
What is 2?
The factor if a triangle doubles in size
What is AA similarity ?
if two angles of one triangles equal two angles of another
What is a reduction ?
A dilation with scale factor less than 1
What is (x+3, y+2) ?
A translation moving right 3 and up 2 changes (x,y) to this.
Whats is (-x,-y) ?
A 180 degree rotation around origin maps ( x,y) to this.
What is a SSA ?
The only congruence shortcut that does not work
if a triangle starts at 3 and has a scale factor of 3 whats the new coordinates?
9
if scale factor is 1/2 what's happening ?
the perimeter is shrinking
What is 10 ?
A triangle with sides 3, 4, 5 is scaled by 2 new longest sides.
What is (y, x) ?
Reflection over y = x Changes (x, y) to this
What are equal ?
If two triangles are congruent, all corresponding sides are this.