Дано: ΔCAB,BC=AC.
Боковая сторона треугольника в 2 раз(-а) больше его основания.
Периметр треугольника CAB равен 250 см.
Вычисли стороны треугольника.

BA=
;

BC=
;

AC=

Помогите!! Надо написать сочинение на английском про "Disaster")

За ранее спасибо))

У меня только первое предложение "I thinking that people don't know what disaster is awaitsing their at every step" -, а дальше в голову больше ничего не идёт!!

 Помогите выполнить задание, пожалуйста.

 Перепишите текст, заполнив пропуски необходимыми по смыслу словами из предложенного списка. Изменяйте форму глагола там, где это грамматически обусловлено.

1)Operation Tiger

create left remain save

Seventy years ago there were 100,000 tigers in the world. Today there are no more than 8,000 ______ . In 1972 the World Wildlife Fund organized 'Operation Tiger' to ______ the tigers that ______ . Eighteen tiger reserves have been ______ in India and three in Nepal.

2)Greenhouse effect

Hold Atmosphere Destroy Burn Job Cans Produce Drive

The earth has been getting hotter because we are ______ too many “greenhouses gases”. These gases ______ the heat. Trees and plants help take gases such as carbon dioxide from the ______, but we have now ______ too many trees. There aren’t enough trees and plants to do this ______. We make carbon dioxide when we ______ wood or ______ cars. CFCs (other dangerous gases) are in the refrigerators and aerosol ______.

3)The Ozone Layer

Dangerous Acid Diseases Holes

There is a layer of gas called ozone. It covers the Earth. It protects us from the dangerous rays of the sun. But when ozone gets near to Earth (in ______ rain, for example) it is also very ______ itself and causes ______ . There are also now ______ in the ozone layer.