Which of the following best describes a lens galaxy? O A group of stars that serve as a quick reference to different parts of the sky

O Several billion stars arranged in a disc shape that has uneven edges

O Millions of planets arranged in the shape of a disk with spiraling arms

O Billions of stars arranged in a circular pattern with a flattened core

triangle and cube

step-by-step explanation:

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

: )

step-by-step explanation:

60

step-by-step explanation:

every triangle measures a total of 120 degrees. you have to find angle c. we know that isosceles triangles angles are equal. 60 degrees plus 60 degrees gives you 120.