α= ∘ α 38° α= β= ∘ ∘ β α 25° α= β= δ= ∘ ∘ ∘ δ β α 150° α= β= δ= ∘ ∘ ∘ δ 112° α β α= ∘ α 35° α= ∘ 32° α 25° α= β= ∘ ∘ 102° α 98° β α= ∘ 75° α 10° α= β= δ= ∘ ∘ ∘ α 10° 105° δ β α= ∘ α 132° 20° α= β= ∘ ∘ 22° α β α= β= δ= ∘ ∘ ∘ 18° δ α β α= β= δ= ∘ ∘ ∘ α δ β α= β= ∘ ∘ β α |