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Part 3 From the Ground Up
high. Sometimes a small portico was
added to the main entrance. A portico
is an open space covered with a roof
that is supported by columns. Federal-
style houses also had pediments, which
are architectural roofl decorations flike
that are usually found over a portico,
window, or door. The pediments can be
segmental or triangular, 6-11. During
the Federal period, two important archi-
tectural styles emerged, Adam style and
Early Classical Revival.
Adam Style.
The
Adam style
of archi-
tecture was named after the design
work of two Scottish brothers, Robert
and James Adam. These talented team-
Symmetry
Objects are often described as being symmetrical or l asymmetrical. An object is
symmetrical if a line drawn through it divides it into two matching halves. The dividing
line is called the line of symmetry.y y
An object may have one or more lines of symmetry. For example, a rectangle has
two lines of symmetry. A circle has an infinite number of lines of symmetry since any
line drawn through the center creates a line of symmetry.
An object is asymmetrical if it has 0 lines of symmetry; no two halves match. Your
hand is asymmetrical; you cannot draw a line that will result in two matching halves.
Symmetry creates balance. Architects and interior designers often incorporate
symmetry in their work. For example, the exterior of a Georgian home exhibits symmetry.
You can also achieve symmetry by placing matching chairs on both sides of an entryway.
MATH MATTERS
Equilateral Triangle with 3 lines of symmetry Square with 4 lines of symmetry
Rectangle with 2 lines of symmetry