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Tính số đo các góc AOC, BOC, BOD, AOD biết AOC-BOC=60 độ

Hai đường thẳng AB và CD cắt nhau tại O. Biết rằng \(\widehat{AOC}-\widehat{BOC}=60^o\)Tính số đo các \(\widehat{AOC};\widehat{BOC};\widehat{BOD};\widehat{AOD}\)

Ai làm xong nhanh và đúng mình tick cho

Theo dõi Vi phạm
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  • C D B A O Ta có góc AOC-góc BOC= 60 độ mà góc AOC+ góc COB= 180 độ

    => Góc AOC=\(\frac{180+60}{2}=120\)(độ)

    và Góc COB=180 độ -góc AOC =180-120=60độ

    Ta có góc AOC= góc BOD= 120 độ (đối đỉnh)

    góc COB= góc AOD =60 độ (đối đỉnh)

    Vậy........

      bởi pham thi hieu Tâm 26/12/2018
    Like (0) Báo cáo sai phạm

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