: Cho hình chóp S. ABCD , đáy ABCD là hình tứ giác lồi . Gọi M , N lần lượt là trung điểm của SB , SD .
Xác định giao tuyến của (SAD) và (SBC), (SAB) và (SCD)

Joel wants to buy a new tablet computer fram a store having a 20% off sale on all tablets. the tablet he wants has an original cost of $190. he also wants to make sure he has enough money to pay the 5% sales tax. part one joel uses the incorect expression 0.95(190)(0.8) to calculate that the tablet will cost him a total of $144.40. describe his error and write the correct expression part two how much will joel pay for the tablet show your work if you answer this question correctly you will receive a prize of 99 points good luck

The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22

Which geometric principle is used to justify the construction below?