Mathematics, 22.07.2021 14:00, nicoleaaliyah

Tam giác RST R=90 độ , đường cao RH. Từ H kẻ HE vuông góc RS, HF vuông góc RT. Biết RT = 28cm, ST = 35cm. a/ Tính EF;
b/ Tính chu vi tam giác HFT
c/ Gọi M là trung điểm của HT, vẽ MK vuông góc RT. Chứng minh rằng RE. FM = KF. EF

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Tam giác RST R=90 độ , đường cao RH. Từ H kẻ HE vuông góc RS, HF vuông góc RT. Biết RT = 28cm, ST =...