Bonsoir,
Pythagore:
LI² = LO² + OI ²
LI² = 21² + 20²
LI² = 441+ 400
LI² = 841
LI = √841 => 29cm
Réponse:
lo=21
lo=21×21=441
oi=20
oi=20×20=400
441+400=841
=29cm
29×29=841
li=29cm
