题目内容
(原创题)如图所示,L1∥L2,CD⊥L2垂足为C,AO与L1交于B,与CD交于点O,若∠AOD=130°,求∠1的度数.
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过O作OE∥L1,则L1∥L2∥OE,
∴∠1=∠AOE;
又∵CD⊥L2,
∴∠COE=180°-90°=90°,
∴∠AOE=130°-90°=40°,
∴∠1=40°.
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∴∠1=∠AOE;
又∵CD⊥L2,
∴∠COE=180°-90°=90°,
∴∠AOE=130°-90°=40°,
∴∠1=40°.
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