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2014-05-04T16:59:35+03:00
AB/AC= 3/4 = > AB= 3/4 AC

Δ dreptunghic => teorema lui Pitagora => BC²= AB²+AC² => BC² = (3/4AC)² + AC² => BC² = 9/16AC²+AC² => BC² = 25/16 AC² =>  BC = 5/4 AC. 

P = 72 => AB+AC+BC = 72 => 3/4AC+AC+5/4AC = 72 = > 12/4AC=72 => 3AC=72 => AC= 24. 
AB = 3/4AC=> AB= 18

Aria = AB*AC/2 = 24*28/2 = 216
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