Calculated Industries 3088 - Manual (Page 51)

Appendix A
AREA FORMULAS
Your new calculator can perform these helpful
formulas -- right in feet, inches and fractions --
to provide even more useful solutions to your
dimensional problems.*
w
l
Rectangle
Area = lw
b
a
Triangle
Area = ab
1
2
Square
Area = a
a
a
2
r
Circle
Circumference = 2
π
r
Area =
π
r 2
b a
Ellipse
Area =
π
ab
* For calculations involving cubed variables (i.e., r 3 ), use the
x 2 key to raise it to the second power, then multiply the
result by itself once more to achieve the desired
exponential value. For example, to find 2
3
press: 2 [Conv]
[
√
] = 4 [x] 2 gives you 8.
User’s Guide — 51