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for items 7 - 10, use the figure shown. find the coordinates of the ver…

Question

for items 7 - 10, use the figure shown. find the coordinates of the vertices of each image.

  1. a reflection across ( y = 0 ), then a translation 1 unit left and 2 units up ( s:(square,square) )
  2. a rotation ( 180^{circ} ) about the origin, then a reflection across ( x = 0 ) ( r:(square,square) )
  3. a translation 2 units left and 3 units down, then a rotation ( 90^{circ} ) about the origin ( t:(square,square) )
  4. a translation 3 units right, then a reflection across ( x = 0 ) ( q:(square,square) )
  5. what type of symmetry does a square have?

a reflectional by not rotational symmetry.
b rotational but not reflectional symmetry.
c both reflectional and rotational symmetry.
d a rectangle is not symmetric.

  1. if a figure is translated 5 units left and 3 units up, which translation moves the image back to the original position?

a 5 units right and 3 units down
b 5 units left and 3 units up
c 5 units up
d 5 units left

  1. given the regular polygon shown, select all of the rotations and reflections that carry the figure onto itself.

a. a rotation of ( 120^{circ} ) around the center, point ( d )
b. a reflection across line ( c ), through the midpoints of opposite sides
c. a reflection across line ( a ), through a vertex and a midpoint of an opposite side
d. a reflection across line ( b ), through one vertex, the center ( d )
e. a rotation of ( 60^{circ} ) around the center, point ( d )

  1. for a rotation ( r_{(x^{circ},p)} ), which of the following is not true?

a the transformation rotates every point in the preimage ( x^{circ} ) about a point ( p ).
b for a preimage point ( a, pa = pa ).
c for a preimage point ( p ), ( mangle pap = x ).
d for a preimage point ( a ), there are no two values of ( x ) that result in the same location for the image.

  1. point ( p(-3,-2) ) is the image of point ( p(-1,5) ) under a translation. what is the image of ( (2,-5) ) under the same translation?

a ( (9,-3) )
b ( (0,-12) )
c ( (-2,-12) )
d ( (-2,2) )

Explanation:

7.

Step1: Encontrar la reflexión de \(S\)

El punto \(S\) tiene coordenadas \((0, - 2)\). La reflexión sobre \(y = 0\) (el eje \(x\)) cambia el signo de la coordenada \(y\). Entonces, \(S_1=(0,2)\).

Step2: Aplicar la traslación

La traslación es \(1\) unidad a la izquierda (\(x=x - 1\)) y \(2\) unidades hacia arriba (\(y=y + 2\)).
Para \(x\): \(0-1=-1\).
Para \(y\): \(2 + 2=4\).

Step1: Encontrar la rotación de \(R\)

El punto \(R\) tiene coordenadas \((4,-3)\). La rotación de \(180^{\circ}\) sobre el origen cambia \(x\) a \(-x\) y \(y\) a \(-y\). Entonces, \(R_1=(-4,3)\).

Step2: Aplicar la reflexión

La reflexión sobre \(x = 0\) (el eje \(y\)) cambia el signo de la coordenada \(x\). Para \(x=-4\), \(x_2 = 4\), \(y\) permanece \(3\).

Step1: Encontrar la traslación de \(T\)

El punto \(T\) tiene coordenadas \((-3,1)\). La traslación de \(2\) unidades a la izquierda (\(x=x-2\)) y \(3\) unidades hacia abajo (\(y=y - 3\)).
Para \(x\): \(-3-2=-5\).
Para \(y\): \(1-3=-2\). Entonces, \(T_1=(-5,-2)\).

Step2: Aplicar la rotación

La rotación de \(90^{\circ}\) sobre el origen: Si un punto \((x,y)\) se rota \(90^{\circ}\) sobre el origen, la fórmula es \((x,y)\to(-y,x)\).
Para \(x=-5\) y \(y = - 2\), \(x_2=2\), \(y_2=-5\).

Answer:

\((-1,4)\)

8.