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Fig a :

P = 4c
P = 4×11
P = 44 m

A = c²
A = 11²
A = 121 m²


Fig b :

P = 2L + 2l
P = 2×15 + 2×6
P = 42 cm

A = L × l
A = 15 × 6
A = 90 cm²

Fig c :

P = 2∏r
P = 2∏ × 7
P = 14∏ ≈ 44 m

A = ∏ × r²
A = ∏ × 7²
A = 49 ∏ ≈ 154 m²

Fig d :

P = opposé + adjacent + hypoténus
P = 6 + 8 + 10
P = 24 m

A= base × hauteur /2
A= 8 × 9 /2
A= 36 m²