gleichseitiges Dreieck: `a = 23" cm"; h = ?; A = ?`

Lösung: `h = 19.92" cm"; A = 229.06" cm²"`

Zylinder: `r = 8.3" cm"; h = 7.6" cm"; A_"O" = ?; V = ?`

Lösung: `A_"O" = 829.19" cm²"; V = 1644.82" cm²"`

Quadrat: `a = 70" m"; A = ?; d = ?`

Lösung: `A = 4900" m²"; d = 98.99" m"`

Kreisring: `r_1 = 30" cm"; r_2 = 17" cm"; A = ?`

Lösung: `A = 1919.51" cm²"`

gleichseitiges Dreieck: `a = 71" cm"; h = ?; A = ?`

Lösung: `h = 61.49" cm"; A = 2182.82" cm²"`