This isn't even math- But it varied, from first stone, then copper, iron, steel, etc
Axes is plural; axis is singular (only one of them).
The x and y axes on the Cartesian plane intersect at the origin at right angles
The X and Y axes meet at the origin.
It has axes.
A medieval biller made axes.
Most of these are made out of steel and have wood handles.
Wooden handles and hardened steel axe head.
Wooden handles and hardened steel axe head.
Lots of people have made axes over the years, too many to name here,
Lots of people have made axes over the years, too many to name here,
The possessive form of the noun sentry is sentry's.Example: After many hours, the sentry's feet were aching.
sentry
Sentry Group was created in 1930.
Earth Sentry was created in 1999.
Sentry - Kree - was created in 1967.
Travel Sentry was created in 2003.