Question

i)lungimea segmentului [A^1 A^10]
ii)distanta dintre mijloacele segmentelor [A^1 A^5] si [A^8 A^10]

va roooog cu rezolvare completa

Answer 1

Observam ca A1A2=2 cm, A2A3=4 cm, A3A4=6 cm, A4A5=8 cm, A5A6=10 cm, A6A7=12 cm, A7A8=14 cm, A8A9=16 cm si A9A10=18 cm.

A1A10=A1A2+A2A3+...+A9A10=2+4+6+....+18=2(1+2+3+...+9)=2*9*10/2=9*10=90 cm

A1A5=A1A2+A2A3+...+A4A5=2+4+...+10=2(1+2+...+5)=2*5*6/2=5*6=30 cm
A8A10=A8A9+A9A10=16+18=34 cm