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Pravokotnik
- 1.
Pravokotniko = 2(a+b)p= abd = koren a2 + b2 paralelogramo = 2(a+b)p = ava = bvbtrikotnikα + β + ɣ = 180o<br />O = a + b + cp = ava/2 = bvb/2 = cvc/2trapezo = a + b + c + dp = a+c/2 * vkvadrato = 4ªp = a2d = a * koren 2rombO = 4ap = e*f/2 p = a*vaenakostranični trikotniko = 3ªp = a2 * koren 3 / 4v = a * koren 3 / 2deltoid o = 2(a + b)p = e*f/2obsek krogao = 2πrDolžina krožnega izsekapi = πr2 α o / 360oPloščina krožnega kolobarjapk = π(R2 – r2)<br />