Question

A∈[BC]; BC =12 cm. Determina lungimile segmentelor AB si AC,daca AB este de 3 ori mai mare decit AC

Answer 1

AB+AC=12cm ,unde BC=12cm;
⇒AB=3AC;
⇒3AC+AC=12cm
⇒4AC=12cm
⇒AC=3cm;
⇒AB=3·3cm
⇒AB=9cm;