Dave Gerr - Boat Mechanical Systems Handbook-How to Design, Install, and Recognize Proper Systems in Boats

APPENDIX A

Most sections through tanks in boats are
some form of regular area—a rectangle,
trapezoid, circle, segment of a circle, or
some combination of these. Use the follow-
ing formulas to determine the areas.
Remember that complex plane figures can

be divided up into combinations of these

standard shapes. In such cases, you divide

the shape up into these regular areas.

Calculate each area, and add them together

to get the total area of the figure (i.e., of the

tank section).

Calculating Areas

of Plane Figures

APPENDIX A

Rectangle and Trapezoid:

Area B H

Square:

Area H^2

Trapezoid:

Area =A (B C)  2

Trapezium:

Divide into triangles.

Find area of each triangle, and add for total.