2. GEOMETRY
The word "geometry" comes
from the Greek words "geo"
(earth) and "metron" (measure),
reflecting its origins in land
surveying. Early civilizations,
such as the Egyptians and
Babylonians, developed
geometric techniques to
measure distances, areas, and
volumes, and to lay out buildings
and temples.
11. STRAIGHTLINE
A straight line is a one-
dimensional shape that
extends infinitely in both
directions. It has no
width or thickness, and
it is completely straight
with no bends or curves.
Straight lines are often
used as a way to
represent motion or
change.
12. PARALLELLINE
In geometry, parallel
lines are two or more
lines in the same plane
that never intersect no
matter how far they are
extended. They are
always the same
distance apart and have
the same slope. The
symbol for parallel lines
is ∥.