Engineering Fundamentals: An Introduction to Engineering, 4th ed.c

176 Chapter 7 Length and Length-Related Parameters

TABLE 7.4 Some Useful Area Formulas

Triangle

Rectangle

Abh

Parallelogram

Abh

Trapezoid

n-sided Polygon

Circle

ApR

2

Aa

n

4

bb

2

cota

180°

n

b

A

1

2

1 ab 2 h

A

1

2

bh h

b h b h b h

a

b

b

R

Continued

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