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a
a
a
a
2
=
d
2
-b
2
a
=
(P - 2·b) / 2
a
=
A / b
b
b
b
b
2
=
d
2
-a
2
b
=
(P - 2·a )/ 2
b
=
A / a
d
d
o
d
d
2
=
a
2
+b
2
d
2
=
(P
2
-4·b·P+8·b
2
)/4
d
2
=
(P
2
-4·a·P+8·a
2
)/4
P
P
P
P
=
2 ·a+2 ·b
P
2
=
4· d
2
+8·A
A
A
A
A
=
a·b
A
=
(P
2
-4 ·d
2
)/8
Rectangle: Surface area, sides, diameter, perimeter
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