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2014-03-13T17:41:47+02:00
Constuiesti inaltimea DF
Afli  FC:
FC=(BC-AD)/2 BE=FC=(66-34)/2=32/2=16
FC=16cm;
In triunghiul DFC aplici Pitagora: DC²=DF²+FC²⇒DC²-FC²=DF²⇒DF²=34²-16²⇒
DF²=1156-256=900⇒DF=√900=30cm