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Mathematics, 26.08.2021 14:00 love123jones

Cho hình thang cân ABCD, đáy nhỏ AB. Vẽ AH ⊥ CD. Chứng minh rằng DH =
CD − AB/2
.

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Cho hình thang cân ABCD, đáy nhỏ AB. Vẽ AH ⊥ CD. Chứng minh rằng DH =
CD − AB/2
....

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