Chp. 2

Question 1

what is a vector? (2.1)

Answer 1

A quantity with both measure and velocity

Question 2

what is a reflection? (2.2)

Answer 2

across line L

Question 3

what is the rule for reflection across the X axis? ** (2.2)

Answer 3

(x,y) > (x,-y)

Question 4

what is the rule for reflection across the y-axis? ** (2.2)

Answer 4

(x,y) > (-x,y)

Question 5

what is the rule for reflection across the line Y=X? ** (2.2)

Answer 5

(x,y) > (y,x)

Question 6

what is the rule for reflection across the line Y=-X? ** (2.2)

Answer 6

(x,y) > (-y,-x)

Question 7

what is a rotation?

Answer 7

transformation around point P

Question 8

what is center of rotation?

Answer 8

Point around which a figure is rotated

Question 9

what is angle of rotation?

Answer 9

all angles with vertex be formed by a point in its image have the same measure

Question 10

what is the rule for rotation for 90° counterclockwise?

Answer 10

(x,y) > (-y,x)

Question 11

what is the rule of rotation for 180°?

Answer 11

(x,y) > (-x,-y)

Question 12

what is the rule for rotation for 270° counterclockwise?

Answer 12

(x,y) > (y,-x)

Question 13

what is the rule for rotation for 360°?

Answer 13

(x,y) > (x,y)

Question 14

what is a translation? (2.1)

Answer 14

the segment joining point in its image has the same length as the vector and is parallel to the vector

Question 15

how do you find the line of reflection?

Answer 15

using the midpoint formula

Question 16

how does a translation affect a figure?

Answer 16

it doesn’t resize, rotate, or flip the figure, just slide it somewhere else

Question 17

what are perpendicular lines?

Answer 17

Lines that intersect at right angles