Final Flashcards
Reflecting about the y-axis
-x,y
180 CCW rotation
-x,-y
90 CCW rotation
-y,x
270 CCW rotation
Y,-x
Rule for counterclockwise rotation
For every 90 degrees you rotate, flip letters AND sign of the first letter
Rule for rotating clockwise
Flip letters AND sign of second letter
Rules for rotation about a point
- First write out points
- make second table applying rotation rule(things like 90 CCW about the origin)
- then add new points to old
Composition
Multiple transformations(ex: glide reflection) Order does matter when doing them
Scale factor
Image over pre-image
Enlargement
When the SF is greater than one
Reduction
When SF is between 0 and 1
Properties of parallelogram(5)
Opp. Sides are para
Opp. Sides are congruent
Opp. Angles are supp.
Diags. Bisect
Reflecting about the x-axis
X,-y
Properties of kite(5)
- 2 pairs of consecutive congruent sides that’s opposite sides are not congruent
- diag. Are perpendicular
- one pair of opposite angles at short end of diagonal are congruent
- long diagonal is perpendicular bi sector of short
- long diagonal bisect opposite angles
Trapezoid(2)
- pair of parallel sides
- non base consecutive angles are supp.
Properties of rhombus(8)
Diags are perpendicular
Four congruent sides
Diagonal bisect opposite angles
All properties of parallelogram