已知:如图是七角星形,求角A+角B+角C+角D+角E+角F+角G=?
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![已知:如图是七角星形,求角A+角B+角C+角D+角E+角F+角G=?](/uploads/image/z/6965010-18-0.jpg?t=%E5%B7%B2%E7%9F%A5%EF%BC%9A%E5%A6%82%E5%9B%BE%E6%98%AF%E4%B8%83%E8%A7%92%E6%98%9F%E5%BD%A2%2C%E6%B1%82%E8%A7%92A%2B%E8%A7%92B%2B%E8%A7%92C%2B%E8%A7%92D%2B%E8%A7%92E%2B%E8%A7%92F%2B%E8%A7%92G%3D%3F)
已知:如图是七角星形,求角A+角B+角C+角D+角E+角F+角G=?
已知:如图是七角星形,求角A+角B+角C+角D+角E+角F+角G=?
已知:如图是七角星形,求角A+角B+角C+角D+角E+角F+角G=?
如图,
∠B+∠F=∠1,
∠C+∠G=∠2,
∠A+∠E=∠3,
∠1+∠2=∠4,
∴∠A+∠B+∠C+∠D+∠E+∠F+∠G
=∠1+∠2+∠3+∠D
=∠4+∠3+∠D
=180°