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Theo giả thiết, ta có:
\left( {\widehat {SC,\left( {ABC} \right)}} \right) = \widehat {SCA} = {30^^\circ } \Rightarrow SA = AC\tan {30^^\circ } = \frac{{a\sqrt 3 }}{3}
Vậy thể tích khối chóp S.ABC là:
The com pany is going to close....................one of it s stores due tore duced sales.
A.on B.to C.down
23.He was think in go fo passing....................the work shop to his es destson.
A.with B.to C.down
24.You had to face up....................the fact that she would never come back.
A.to B.at C.with
25.I just won dered why she turned....................his offerofhelp.
A.on B.down C.back
26.He is going to set....................a travel company nex tyear.
A.down B.with C.up
27.If she doesn’t turn....................bye.15 they will leave the party.
A.on B.up C.off
28.He wan ted someone to take....................his role once here tired.
A.over B.up C.back
Task 21
1 A với C giống
2 A
Task 22
1 Van Gogh’s paintings arre almost as expensive as the work of Picasso
2 We didn't known the Recycled Orchestra until we watched the video online yesterday
Cảm ơn cậu rất rất nhiều ❤