TRANSFORMATIONS
WHAT KIND OF TRANSFORMATION IS A "SLIDE"?
A TRANSLATION
HOW MANY MONTHS END WITH THE LETTER R?
4 (SEPTEMBER, OCTOBER, NOVEMBER, DECEMBER).
WHICH SCALE FACTORS WOULD ENLARGE A FIGURE? CHOICES: 2, 0.5, 1.5, 0.75, 100
2, 1.5, AND 100
WHICH SCALE FACTORS WOULD REDUCE A FIGURE? CHOICES: 2, 1.5, 0.75, 0.9, 1/2
0.75, 0.9, and 1/2
What is distortion in geometry?
Distortion is when an image changes shape or size because the grid it is copied onto is stretched, curved, or uneven.
WHAT TRANSFORMATION IS A "FLIP"?
A REFLECTION
If you count forever, you will eventually reach infinity.
False
NAME THREE SCALE FACTORS THAT WOULD ENLARGE A FIGURE DURING A DILATION.
ANY NUMBER GREATER THAN 1. (such as 2, 3, or 1.5)
NAME ANY SCALE FACTOR THAT WOULD REDUCE A FIGURE DURING A DILATION.
ANY NUMBER LESS THAN 1 & GREATER THAN 0
What stays the same in Distortion?
The orientation
WHAT IS A DILATION? DESCRIBE THE TRANSFORMATION.
MAKING SOMETHING BIGGER OR SMALLER (but keeping the shape the same)
Parallel lines meet eventually if they try hard enough.
FALSE
DOES THE SHAPE OF A FIGURE EVER CHANGE WHEN WE ENLARGE A FIGURE?
NO!!!! ONLY THE SIZE.
WHAT CHANGES WHEN A FIGURE IS REDUCED?
SIZE ONLY, NOT THE SHAPE.
If two points are close together in the original image, will they always stay the same distance apart in a distorted grid?
No, the distance may change.
A 90 DEGREE CLOCKWISE ROTATION IS THE SAME AS A ________ DEGREE ROTATION IN A COUNTER-CLOCKWISE ROTATION.
270 DEGREES
After tomorrow we're done learning math for the year!
FALSE
COORDINATE C IS LOCATED AT (-4, 7). C' IS LOCATED AT (-16, 28). WHAT IS THE SCALE FACTOR?
4
A TRIANGLE HAS COORDINATES (3,3), (9,12), & (6,0). A SCALE FACTOR IS APPLIED OF 1/3. WHAT ARE THE NEW COORDINATES?
(1,1) (3,4) (2,0)
Triangle ABC has vertices. A(1,2), B(3,1), C(2,4). Apply the mapping rule (x,y)→(2x,3y)
Find the coordinates of the image A′B′C′
A′(2,6)
B′(6,3)B′(6,3)
C′(4,12)C′(4,12)
YOU CAN ROTATE AN OBJECT THIS MANY DEGREES AND THE DIRECTION YOU SPIN WON'T MATTER.
180 DEGREES or 360 DEGREES
If you add two odd numbers, the answer is always even.
True
IF A SQUARE HAS AN AREA OF 25cm squared, AND IS ENLARGED BY A SCALE FACTOR OF 2, WHAT IS THE NEW AREA.
100 cm squared.
COORDINATE B IS LOCATED AT (20, 32). B' IS LOCATED AT (5,8). WHAT IS THE SCALE FACTOR?
1/4
A point P(x,y) follows the rule. (x,y)→(2x,3y). If the image point is (12,9), what was the original point?
Solve backwards
2x=12⇒x=6
3y=9⇒y=3
Original point: (6,3)