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Mathematics, 24.07.2021 05:50 xxkeyxx51

Cho hình chóp sabcd có đáy abcd là hình thoi tâm o . sb vuông góc abcd khẳng định nào sai ?
a. sc vuông góc bd
b. sa oc
c. sobd
d. bcsb

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Cho hình chóp sabcd có đáy abcd là hình thoi tâm o . sb vuông góc abcd khẳng định nào sai ?
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