The answer is A. (3,-1/2)
Answer:
Gregoire is correct; the diameter is a chord that passes through the center of the sphere.
Step-by-step explanation:
A sphere is a geometrical shape formed from a circle. Some of its parts are: diameter, center, radius circumference, etc.
The center of a sphere is a point at its middle. The diameter is a straight line, e.g a chord, that is drawn from one point on the circumference of a sphere to another point and passes through its center. While radius is a line that is from the center of the sphere to a point on its circumference.
A diameter is twice of a radius, so that:
Radius = 
⇒ Diameter = 2 × Radius
Therefore with respect to the question, Gregoire is correct because a diameter is a chord that passes through the center of the sphere.
Answer:
y=2
Step-by-step explanation:
Area = length x width
Perimeter = 2(l + w)
Let's imagine one of the sides is 6. The other side would have to be two, and the perimeter would be 16.
If one of the sides is 4, the perimeter would be 14.
If one of the sides is 1, the perimeter would be 26.