球きゅう面めん

noun

spherical surface

Refers to the surface of a sphere, often used in geometry and physics.

• 地ち球きゅうの表ひょう面めんは球きゅう面めんに近ちかい。

  The Earth's surface is close to a spherical surface.

noun

sphere

In mathematics, used to refer to the sphere as a whole, including its surface and interior.

• 球きゅう面めんの方ほう程てい式しきを導どう出しゅつする。

  Derive the equation of a sphere.