Mathematics, 23.07.2021 05:20 kanonhuffmanp3rnmy
Cho hình chóp S. ABCD, có đáy là hình vuông cạnh a, mặt bên (SAB) là tam giác đều, SC = a√2 . Gọi H, K lần lượt là trung điểm của AB, AD
a. Chứng minh rằng SH vuôn góc với mặt đáy
b. Chứng minh rằng AC vuông góc với SK và CK vuông góc với SD.
Answers: 3
Mathematics, 21.06.2019 15:00
"princess tower" in dubai is considered the world's tallest residential building, towering to 1 0 1 101 floors! t ( n ) t(n) models the number of tenants living on floor n n of the tower. what does the statement t ( 2 0 ) = t ( c ) t(20)=t(c) mean?
Answers: 2
Mathematics, 21.06.2019 20:00
Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?
Answers: 2
Mathematics, 21.06.2019 22:00
The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample
Answers: 1
Cho hình chóp S. ABCD, có đáy là hình vuông cạnh a, mặt bên (SAB) là tam giác đều, SC = a√2 . Gọi H,...
Mathematics, 15.04.2020 22:42
Mathematics, 15.04.2020 22:42
Mathematics, 15.04.2020 22:42
English, 15.04.2020 22:42
Health, 15.04.2020 22:42
Mathematics, 15.04.2020 22:42
History, 15.04.2020 22:42