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    a, b, c - Sides A - Area P - Perimeter ha, hb, hc - Heights of sides a, b, c α, ß, γ - Internal angles r - Radius of inscribed circle R - Radius of circumscribed circle
    a =units
    b =units
    c =units
    A =units²
    P =units
    ha =units
    hb =units
    hc =units
    α =°
    ß =°
    γ =°
    r =units
    R =units