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Matematica E Simpla • View topic - Valoarea raportului a doua segmente

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 Post subject: Valoarea raportului a doua segmente
PostPosted: Sun Dec 07, 2008 7:06 pm 
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Joined: Sun Dec 07, 2008 4:53 pm
Posts: 2
Enunt:
Cum se calculeaza valoarea raportului dintre segmentele AB si BD?


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 Post subject: Re: Valoarea raportului
PostPosted: Sun Dec 07, 2008 7:53 pm 
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Joined: Wed Oct 22, 2008 6:27 pm
Posts: 29
Rezolvare:
Raportul dintre doua numere a si b este a : b.
In cazul a doua segmente, se cere sa se calculeze raportul dintre lungimile lor.
De exemplu:
Lungimea lui AB este 3.
Lungimea lui BD este 5.

Exprimarea corecta este:
Raportul dintre lungimea lui AB si lungimea lui BD (ambele lungimi sunt numere) - in loc de raportul dintre AB si BD. Este important sa stii acest lucru, pentru ca daca intelegi ca lungimile sunt de fapt niste simple numere, o sa lucrezi mai usor cu ele.

Raportul dintre lungimea lui AB si lungimea lui BD este 3/5.

In unele probleme, nu stii lungimile celor doua segmente, dar stii alte detalii. De exemplu, din anumite calcule stii ca AB/BD = AC/CE (sa zicem). Daca stii sa caculezi AC/CE, atunci afli si AB/BD.

Pentru mai multe amanunte, trebuie sa vad enuntul complet al problemei.


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