Răspuns:
a) R= 8
R= l₄√2/2⇒ l₄= 16/√2=16√2/2=8√2 cm
a₄= l₄/2=8√2/2=4√2 cm
S₄= l₄²= (8√2)²=128 cm²
b) l₄= 6√2
R= 6√2·√2/2= 6 cm
a₄= 6√2/2=3√2 cm
S₄=(6√2)²=72 cm²
c) a₄=5
a₄= l₄/2⇒ l₄ =5·2=10 cm
R= 10√2/2=5√2 cm
S₄= 10²=100 cm²
d) S₄= 16 cm²= l₄²
l₄=√16= 4 cm
R= 4√2/2=2√2 cm
a₄= 4/2=2 cm
Explicație pas cu pas:
