Mathematics, 09.09.2021 16:40 kashusledbetter
Cho tam giác abc vuông tại a, có d là trung điểm của cạnh bc biết ab=6cm;ac=8cm
a/ tính độ dàme ad
b/ kẻ dm vuông góc ab, dn vuông góc ac. chứng minh tứ giác amdn là hình chứ nhật
c/ tam giác abc phải có thêm điều kiện gì để tứ giác amdn là hình vuông?
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Cho tam giác abc vuông tại a, có d là trung điểm của cạnh bc biết ab=6cm;ac=8cm
a/ tính độ dàme ad...
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