Answer:
it is known as big bang reproduction
the area of the square is: 100
the area of the circle is: 78.5
i THINK if you subtract it, it will be 21.5
the answer is moon. the name tells you what you can't see. since in a solar eclipse you can't see the sun that means that the moon is in between us on earth and the sun. which is why we can't see it
This is the integumentary system which is also your skin system