a ruler
The answer is Area. The answer is Area.
That's the 'volume' of the figure.
a cone
A circle (2D) or a sphere (3D)
Circumscribing.
a polygon
The answer is Area. The answer is Area.
isn't it called face?
That's the 'volume' of the figure.
-- The amount of paper you'd have if you cut the figure out. -- The amount of carpet you need to completely cover the figure.
If it's a 3 dimensional shape then it is volume otherwise it is surface area
a cone
Circumscribing.
circumscribed
A circle (2D) or a sphere (3D)
An acute triangle.
A sphere is a closed geometric figure with every location on it's surface equidistant from and infinity small center point.