WARM UPMONDAY FEBRUARY 3, 2014

1. Rotate the point A(4,6) 180º CCW.

2. Rotate the triangle BCD 180º B(1,1), C(3,-2), D(-2, -2).

EOCT

1.

REVIEW

REFLECTIONS

PREIMAGE

ACROSS X-AXISA(X,Y) →ACROSS Y-AXISB(X,Y) →ACROSS Y=XC(X,Y) →ACROSS Y=-XD(X,Y) →

IMAGE

A’(X,-Y)

B’(-X,Y)

C’(Y,X)

D’(-Y,-X)

1

ACROSSY = -2

ACROSSX = 1

LINE A(-1,1) B(-3,4)

TRANSLATION

A shift or a slide along a vector (±a, ±b)

PREIMAGEA(X,Y) → A’(X ± a, Y ± b)

YOU TRY!

1. Translate A(5, 6) by (x-4, y + 6)A’(1, 12)

2. Translate B(-7, -3): 7 units right and 3 units upB’(0,0)

3. Translate C(4, -4): 10 units left and 6 units downC’(-6, -10)

ROTATIONS

PREIMAGE

Rotate 90º CWA(X, Y) →Rotate 90º CCWB(X, Y) →Rotate 180ºC(X, Y) →

IMAGE

A’(Y, -X)

B’(-Y, X)

C’(-X, -Y)

GOOD LUCK!!!