S треугольника РКТ=9, угол Р=а, угол Т=в. Найти R.

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Вместо многоточия нужно вставить артикли : THE ; --
...boiling kettle filled ...kitchen with...steam .
i don't mind staying at ...home and looking after ...children this afternoon .
If you went to ...Indonesia for...summer you would enjoy it there.
...Royal Hotel was almost completely destroyed by fire last saturday .
You can't expect ...kindness and ... support from your family of you don't give ...same to them.
...guests didnt have to clear up after ...party . ... staff did all ...cleaning...next day.
... birds can fly high in ...sky.
they manager to arrive on ...time despite ... heavy snow storm.
...National gallery is located in ...Trafalgar Square .
in sprite of ...fact that ...music was quiet...neighbours complained.
...goverment plans to help ...poor and ...unemployed.
...temperature will drop significantly during ...afternoon.
...Drought this year has been less severe that last year.
I enjoy talking to ...old people.
Arthur Clarke began writing ... science fiction in...1930s.
Could you turn down ... music? It's too loud.
Cover ...pan with a lid when ...sauce has boiled and let it simmer.
He promised he would never bet on ...horses.
he is having ...financial difficulties now.
...blood is thicker than ...water.
...Sahara , ...largest desert, stretches across ... north of...Africa.
...Uncle Tom and ...Aunt Margaret are going to visit their son Tommy at ...university.
have you heard that ... Thompsons are moving from ... Springfield to ... Indianapolis?
...learned people of ...ancient world knew ...earth was round.
...archaeologists now believe that...craft of...metallurgy first started in what is now ...Thailand.
Chinese always produced ...best bronze items to be found in....ancient world.
...earthworms very benefical to ...fertility of...land .
...police continuously directed ...traffic during ...heavy downpour.