A.23 B.32 C.230 D.320
A.a=b≠c α=β=γ=90° B.a=b=c α=β=γ≠90° C.a≠b≠c α=β=γ=90°
A.a=b≠c α=β=γ=90° B.a=b=c α=β=γ=90° C.a=b=c α=β=γ≠90° D.a≠b≠c α=β=γ=90°