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h=3cm
Pc= Pp+Pb
Pp= a kwadrat
Pp= 2cm* 2cm
Pp= 4cmkwadrtowe
Pb= 4* 1/2* a*h
Pb= 2*2cm*3cm
Pb= 12 cm kwadratowych
Pc= 4 cm+ 12cm= 16 cm kwadratowych
PΔ=1/2×3cm×2cm=6cm²÷2=3cm²
Pc=6cm²+4×3cm²=18cm²
/znaczy kreska ułamkowa