Does this figure have rotational symmetry?
a) no, pentagons cannot be rotated.
b) no, it has five lines of symmetry.
c) yes, it has five lines of symmetry.
d) no, it only looks the same if it is rotated 360°. correct answer

D)No, it only looks the same if it is rotated 360°.

Step-by-step explanation:

We are given a pentagon with a solid circle at one of its corner.

We know that a figure is said to has rotational symmetry if it appears exactly same after a rotation about particular degrees.

The order of rotational symmetry is the number of times a shape maps onto itself during a rotation of 360°.

Generally the order of rotational symmetry of a pentagon is 5 as it maps onto itself during a rotation of 360°.

But the given pentagon has  a solid circle at one of its corner, because of this it only looks the same if it is rotated 360°.

Therefore, the given figure do not has rotational symmetry.

la parábola es el lugar

geométrico en el cual los puntos tienen una distancia idéntica, equidistantes,

de un punto denominado foco, f, y una recta denominada directriz

el radio vector de una

parábola es el segmento que existe entre un punto cualquiera y el foco.

por la ecuación se observa

que la parábola abre hacia la derecha, por lo cual podemos usar las siguientes fórmulas

la ecuación ordinaria de la

parábola es y^2 = 4px, donde p es la longitud desde el vértice de la parábola al

foco.

la fórmula de la directriz

es x + p = 0

resolviendo:

y^2-9x = 0

y^2 = 9x

4p = 9, entonces p = 9/4

entonces el foco tendrá la

coordenada f(9/4,0)

la directriz vendrá

expresada por

x + p = 0

x = -p

x = -9/4

el problema indica que la

ordenada es igual a 6, entonces

(6)^2=9x

x = 36/9

x = 4

entonces el punto al cual

hay que obtener la distancia será p(4,6)

calculando se tendrá: pf = 

pf = 6,25 u

ver más en -

step-by-step explanation:

idk

step-by-step explanation:

payback