Предмет: Алгебра, автор: katrin1mai11

Чому дорівнює радіус кулі, якш діаметр 30см? С рисунком пожалуста

Ответы

Автор ответа: Санечка69
1

Ответ: радиус окружности 15 см.

Объяснение:

Нужно знать:

1) диаметр - это хорда, проходящая через центр окружности;

2) димаметр в два раза больше радиуса, т.е. D = 2R, где D - диаметр, R - радиус.

Поэтому:

R = D / 2 = 30 / 2 = 15 (см).

Приложения:
Интересные вопросы
Предмет: Алгебра, автор: Simbachca
Предмет: Математика, автор: nastiastefanyshyn8
Предмет: Английский язык, автор: malkovaad13
1. I (to eat) soup for dinner yesterday.
a) ate
b) eated
c) eaten
2. My parents (to come) home at 9 o’clock last night.
a) came
b) comed
c) come
3. Mike (not to do) his homework yesterday.
a) didn’t did
b) didn’t do
c) doesn’t do
4. Children (to hear) a terrible noise a minute ago.
a) heared
b) heart
c) heard
5. We (not to walk) last Sunday.
a) not walked
b) don’t walk
c) didn’t walk
6. Our neighbours (to sell) their car last month.
a) selled
b) sold
c) sell
7. She (to see) her cousin at school yesterday.
a) saw
b) seed
c) seen
8. Andrew (to help) his parents an hour ago.
a) helps
b) helped
c) helpet

9. Students (to discuss) ecological problems last lesson.
a) discusst
b) discuss
c) discussed
10. I (to send) a message to my friend 5 minutes ago.
a) sent
b) send
a) sended
11. I … TV too much.
a) not watch
b) doesn’t watch
c) don’t watch
12. She … an umbrella to work.
a) don’t carry
b) doesn’t carries
c) doesn’t carry
13. The boys … home after school.
a) don’t hurry
b) doesn’t hurry
c) not hurry
14. You … your parents.
a) doesn’t help
b) not to help
c) don’t help
15. Your children … well at school.
a) not to do
b) don’t do
c) doesn’t do
16. His sons … to the local school.
a) not to go
b) doesn’t go
c) don’t go
17. It … 30 pence.
a) doesn’t cost
b) doesn’t costs
c) don’t cost
18. She … fast.
a) doesn’t speaks
b) don’t speak
c) doesn’t speak
19. They … at 9 o’clock on Sundays.
a) don’t get up
b) don’t gets up
c) not to get up
20. My sister … milk.
a) doesn’t drinks
b) doesn’t drink
c) not drinks