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fie punctele In ordine pe dreapta d AB=2 cm BC=25mm DE=25mm si AE=90mm determinati lungime segmentelor

Răspuns :

A----------B------------C----------D------------E
AB+BC+CD+DE=90mm                 transform 2 cm=20mm
20mm+25mm+X+25mm= 90mm
70mm+X=90mm
X= 90mm-70mm
X=20mm
AB=2cm ,BC=2,5cm,DE=2,5cm, AE=9cm
AE-AB-BC-DE=CD
9-2-2,5-2,5=2