где происходит превращение артериальной крови в венозную в организме человека?помогите,пожалуйста...

 Раскройте скобки, употребляя глаголы в Present Continuous или в Present Simple. 1. I (to rest).......... now. I (to rest).......... every day. 2. They (to talk).............. now. They (to talk)............ every day. 3. He (to drink)............... coffee now. He (to drink)............. coffee every morning. 4.She (to go).............. to school now. She (to go)............. to school every day. 5. They ...............(to have) dinner now? They always ...............(to have) dinner at two o’clock? 6. What ........... she (to write) now? What ............ she (to write) every evening? 7. What he ............... (to do) now? What he ............... (to do) every Sunday? 8.What they ................(to eat) now? What they ................. (to eat) at dinner?

Они вроде лёгкие,но у меня не получается. Решите пожалуйста)))1)Найдите сторону квадрата, если его диагональ равна 10см. 2) Найдите диагональ квадрата, если его сторона равна 8 см.

АВСD- параллелограмм, АВ =АЕ (Е принадлежит АD), угол ВЕА= 70 градусов. Найдите углы параллелограмма.