Jawaban:

(a) Pasangan sudut-sudut sehadap

Nilai sudutnya sama besar, yakni

∠A₁ = ∠B₁, ∠A₂ = ∠B₂, ∠A₃ = ∠B₃, ∠A₄ = ∠B₄

∠A₁ = ∠D₁, ∠A₂ = ∠D₂, ∠A₃ = ∠D₃, ∠A₄ = ∠D₄

∠B₁ = ∠C₁, ∠B₂ = ∠C₂, ∠B₃ = ∠C₃, ∠B₄ = ∠C₄

∠C₁ = ∠D₁, ∠C₂ = ∠D₂, ∠C₃ = ∠D₃, ∠C₄ = ∠D₄

(b) Pasangan sudut-sudut sepihak (besar kedua sudut = 180°)

Sudut-sudut dalam sepihak, yakni

∠A₂ = ∠B₁, ∠A₃ = ∠B₄

∠C₁ = ∠D₂, ∠C₄ = ∠D₃

∠A₃ = ∠D₂, ∠A₄ = ∠D₁

∠B₃ = ∠C₂, ∠B₄ = ∠C₁

Sudut-sudut luar sepihak, yakni

∠A₁ = ∠B₂, ∠A₄ = ∠B₃

∠A₁ = ∠D₄, ∠A₂ = ∠D₃

∠B₁ = ∠C₄, ∠B₂ = ∠C₃

∠C₂ = ∠D₁, ∠C₃ = ∠D₄

(c) Pasangan sudut-sudut berseberangan (besar sudutnya sama besar)

Sudut-sudut berseberangan dalam, yakni

∠A₂ = ∠B₄, ∠A₃ = ∠B₁

∠B₃ = ∠C₁, ∠B₄ = ∠C₂

∠C₁ = ∠D₃, ∠C₄ = ∠D₂

∠A₃ = ∠D₁, ∠A₄ = ∠D₂

Sudut-sudut berseberangan luar, yakni

∠A₁ = ∠B₃, ∠A₄ = ∠B₂

∠B₂ = ∠C₄, ∠B₁ = ∠C₃

∠C₂ = ∠D₄, ∠C₃ = ∠D₁

∠A₁ = ∠D₃, ∠A₂ = ∠D₄