{"id":2316,"date":"2025-05-12T19:51:19","date_gmt":"2025-05-12T16:51:19","guid":{"rendered":"https:\/\/cedra.academy\/?p=2316"},"modified":"2025-09-09T19:54:45","modified_gmt":"2025-09-09T16:54:45","slug":"perimetrul-figurilor-geometrice","status":"publish","type":"post","link":"https:\/\/cedra.academy\/?p=2316","title":{"rendered":"Perimetrul figurilor geometrice"},"content":{"rendered":"\n
Perimetrele figurilor geometrice PPTX i<\/a>Descarc\u0103<\/a><\/div>\n\n\n\n
\"\"<\/figure>\n\n\n\n

Perimetrul unei figuri geometrice reprezint\u0103 lungimea total\u0103 a conturului s\u0103u, adic\u0103 suma lungimilor tuturor laturilor care o formeaz\u0103. Aceasta este o no\u021biune esen\u021bial\u0103 \u00een geometrie, deoarece ne permite s\u0103 \u00een\u021belegem mai bine spa\u021biul ocupat de diferite forme \u0219i s\u0103 aplic\u0103m cuno\u0219tin\u021bele \u00een situa\u021bii practice, precum m\u0103surarea gardurilor, a bordurilor sau a terenurilor.<\/p>\n\n\n\n

Perimetrul poligoanelor<\/strong><\/h4>\n\n\n\n
    \n
  1. P\u0103trat<\/strong>
    P\u0103tratul este un poligon cu patru laturi egale \u0219i patru unghiuri drepte. Perimetrul unui p\u0103trat se calculeaz\u0103 prin adunarea celor patru laturi sau, mai simplu, prin \u00eenmul\u021birea lungimii unei laturi cu 4:<\/li>\n<\/ol>\n\n\n\n

    P=4\u22c5lP = 4 \\cdot lP=4\u22c5l<\/p>\n\n\n\n

    unde lll este lungimea laturii p\u0103tratului.<\/p>\n\n\n\n

      \n
    1. Dreptunghi<\/strong>
      Dreptunghiul are patru unghiuri drepte \u0219i laturi opuse egale. Perimetrul dreptunghiului se calculeaz\u0103 prin formula:<\/li>\n<\/ol>\n\n\n\n

      P=2\u22c5(L+l)P = 2 \\cdot (L + l)P=2\u22c5(L+l)<\/p>\n\n\n\n

      unde LLL este lungimea \u0219i lll este l\u0103\u021bimea dreptunghiului.<\/p>\n\n\n\n

        \n
      1. Triunghi<\/strong>
        Triunghiul are trei laturi \u0219i trei unghiuri. Perimetrul triunghiului este suma lungimilor celor trei laturi:<\/li>\n<\/ol>\n\n\n\n

        P=a+b+cP = a + b + cP=a+b+c<\/p>\n\n\n\n

        unde a,b,ca, b, ca,b,c sunt laturile triunghiului.<\/p>\n\n\n\n

          \n
        1. Poligoane regulate<\/strong>
          Un poligon regulat are toate laturile \u0219i toate unghiurile egale. Perimetrul unui astfel de poligon se calculeaz\u0103 prin \u00eenmul\u021birea lungimii unei laturi cu num\u0103rul total de laturi:<\/li>\n<\/ol>\n\n\n\n

          P=n\u22c5lP = n \\cdot lP=n\u22c5l<\/p>\n\n\n\n

          unde nnn este num\u0103rul laturilor \u0219i lll este lungimea fiec\u0103rei laturi.<\/p>\n\n\n\n

          Perimetrul cercului (circumferin\u021ba)<\/strong><\/h4>\n\n\n\n

          Cercul nu are laturi propriu-zise, dar perimetrul s\u0103u, numit \u0219i circumferin\u021b\u0103, se calculeaz\u0103 folosind raza rrr sau diametrul ddd: C=2\u03c0r=\u03c0dC = 2 \\pi r = \\pi dC=2\u03c0r=\u03c0d<\/p>\n\n\n\n

          unde \u03c0\u22483,14\\pi \\approx 3,14\u03c0\u22483,14. Aceasta m\u0103soar\u0103 lungimea conturului cercului.<\/p>\n\n\n\n

          Aplica\u021bii practice<\/strong><\/h4>\n\n\n\n

          Cunoa\u0219terea perimetrului este foarte util\u0103 \u00een via\u021ba de zi cu zi. De exemplu:<\/p>\n\n\n\n

            \n
          • Pentru a \u00eemprejmui un teren sau o gr\u0103din\u0103.<\/li>\n\n\n\n
          • Pentru a decora o camer\u0103, m\u0103sur\u00e2nd marginile covoarelor sau a bordurilor.<\/li>\n\n\n\n
          • \u00cen construc\u021bii, pentru a calcula cantitatea de material necesar pentru garduri, borduri sau alte elemente.<\/li>\n<\/ul>\n\n\n\n
            \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

            Perimetrul unei figuri geometrice reprezint\u0103 lungimea total\u0103 a conturului s\u0103u, adic\u0103 suma lungimilor tuturor laturilor care o formeaz\u0103. Aceasta este o no\u021biune esen\u021bial\u0103 \u00een geometrie, deoarece ne permite s\u0103 \u00een\u021belegem […]<\/p>\n","protected":false},"author":1,"featured_media":2319,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13,10],"tags":[],"_links":{"self":[{"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/posts\/2316"}],"collection":[{"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2316"}],"version-history":[{"count":1,"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/posts\/2316\/revisions"}],"predecessor-version":[{"id":2322,"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/posts\/2316\/revisions\/2322"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=\/wp\/v2\/media\/2319"}],"wp:attachment":[{"href":"https:\/\/cedra.academy\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2316"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2316"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cedra.academy\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2316"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}