answers
Cubic - ANS ✔a=b=c A=B=Y= 90
Hexagonal - ANS ✔a = b /= c A = B = 90 Y = 120
Tetragonal - ANS ✔crystal system: a = b ≠ c; α = β = γ = 90°
Rhombohedral - ANS ✔a = b = c
α = β = γ ≠ 90°
Orthorhomic - ANS ✔a ≠ b ≠ c α = β = γ = 90
Monoclinic - ANS ✔a≠b≠c
α=γ=90≠ B
Triclinic - ANS ✔crystal system: a ≠ b ≠ c; α ≠ β ≠ γ ≠ 90°