Réponses

2014-03-26T10:35:03+01:00
1) péimètre : p = 4c
p = 4(1+√2)/2
p 2(1+√2)

2) aire : A =c²
A = (1/2+√2/2)²
A = 1/2² + 2x1/2x√2/2 + 1/2
A = 1/4+1/2 + √2/2
A = 1/4+2/2x2+√2/2
A = 3/4+1/2√2
A=1/2(3/2+√2)

rayon : R = C/2
R= (1+√2)/4