d=7cm
a=3√2cm
a²+b²=d²
(3√2cm)²+b²=(7cm)²
18cm²+b²=49cm²
b=√31cm
P=a*b
P=3√2cm*√31cm
P=3√62cm²
c^2=a^2+b^2
7^2=(3 √2)^2+b^2
49=18+b^2
49-18=b^2
31=b^2
b= √31
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d=7cm
a=3√2cm
a²+b²=d²
(3√2cm)²+b²=(7cm)²
18cm²+b²=49cm²
b=√31cm
P=a*b
P=3√2cm*√31cm
P=3√62cm²
c^2=a^2+b^2
7^2=(3 √2)^2+b^2
49=18+b^2
49-18=b^2
31=b^2
b= √31