Answer:
∠ 1 = 24°
Explanation:
∠ WXZ = ∠ WXY + ∠ YXZ , that is
72° = ∠ 1 + 2∠ 1 = 3∠ 1 ( divide both sides by 3 )
24° = ∠ 1
24°
72÷3=24
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