masth

Question 1

All Squared Added together = 1

Answer 1

Sphere

Question 2

Two Squared Added, One subtracted = radius

Answer 2

hyperboloid of one sheet (could be a cone)

Question 3

One positive square, two negative squares = number

Answer 3

Hyperboloid of two sheets (distance appart is square root of number) (cone if number is zero)

Question 4

z=x^2+y^2

Answer 4

paraboloid