Civil Engineering Reference
In-Depth Information
r
C
E
F
h
A
B
H
G
D
Figure 5-50
To circumscribe an octagon about a circle.
Figure 5-51 To describe
an ellipse when the two
axes are given.
C
H
A
B
F
E
G
D
By shifting the paper so that point
b
travels on the major axis and
point
c
travels on the minor axis, any number of points in the curve
may be found through which the curve may be traced.
Mensuration
As mentioned earlier, mensuration is the act, art, or process of
measuring. It is the branch of mathematics that deals with finding
the length of lines, the area of surfaces, and the volume of solids.
Therefore, the problems that follow will be divided into three groups
as follows:
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