Cho khối chóp S.ABCD có đáy là hình vuông cạnh 2a. Gọi H là trung điểm cạnh AB biết SH⊥(ABCD). Tính thể tích khối chóp biết tam giác SAB đều

Cho khối chóp S.ABCD có đấy ABCD là hình chữ nhật AD=2a,AB=a. Gọi H là trung điểm của AD, biết SH⊥(ABCD). Tính thể tích khối chóp biết SA=a√5

Chuyển giúp e vs ạ

He said " I will have finished this paper by tomorrow "

He said " They won't sleep "

She said " It is very quiet here "

She said " I am reading "

They said " I know a better restaurant "

She said " I woke up early "

He said " I will ring her "

They said " We have just arrived "

He said " I will clean the car "

She said " I did not say that "

She said " I don't know where my shoes are "

He said " I won't tell anyone "

" My purse was found by the bus driver " Mary to Peter

" My fiend has his suit sewed " Lily to the girls

" You will win the Nobel Prize " She to me

" We often go to the cinema on Fridays " They to Sam

" We're going to send you an email with the further details " Mr Barns to Mrs Johnson

" I was studying all day yesterday " Eva to her mother

" I've been washing your dirty clothes all morning " Tina to Ben

" I would like to organize our wedding reception " She to me

" This time next week I will be lying on the beach in Vớt Rica " Lily to the girls

" You are reading this book too close " The teacher to Phil

" I should give up eating so much fatty food " Peter to me

" You must finish your book " Mary to Peter