Предмет: Математика, автор: kostya2394

Найдите париметр квадрата со стороной, равной: а) 5см; б) 7см 5мм; в) 10см 3мм

Ответы

Автор ответа: almazeratti
0

Ответ:

а) 20 см; б) 30 см; в) 41,2 см.

Пошаговое объяснение:

Периметр — сумма длин всех сторон. У квадрата четыре стороны и все они равны.

P=4a, где a — сторона квардарата.

а) P=4*5=20 см.

б) P=4*7,5 = 30 см.

в) P=4*10,3=41,2 см.

Похожие вопросы
Предмет: Английский язык, автор: dgeshevaAnny
очень нужно решение. если у кого-то есть или найдете правильные ответы буду очень благодарен.
Тест № 1
1. Употребите правильную форму глагола.
It is 12 o'clock. The family (has/ is having) tea. In the morning my mother (cooks/ is cooking) breakfast for us. I (have/ am having) a car and I usually(drive/ am driving) to work.
4. Dick (leaves/ is leaving) home at half past
eight in the morning. He (goes/ is going)
to his office by bus.
5. In the evening we (watch/ are watching)TV.
6.Look at Mike. He (does/ is doing) his lessons.
7.The weather is fine. The sun (shines/ is shining) and it (doesn't rain/ isn't raining).
8. It often (rains/ is raining) in autumn.
9. Kitty (likes/ is liking) ice-cream.
10. My friend (lives/ is living) in London.
2. Вставьте do или does.
1. …you sleep well? Yes, I... .
2. …your sister wash the plates? Yes, she ....
3. What ... your teacher read to you?
4. … Mr. Snowdon speak Russian? No,he ... not.
5. Where ... you take books from?
6. Pamela ... not drive a car.
7. David ... not like getting up early.
8.How long ... it take you to get to school?
9. ... she play tennis well? No, she ... not.
10. What languages ... John speak?
3. Поставьте вопросы к предложениям.
1. Michael works on a farm. Where ... ?
2. Brenda lives in Leeds. Does ... ?
3. Kevin goes out with friends in the evening. When ... ?
4. Luc likes tea with lemon. What ... ?
5. John Prierce goes to his office by un­derground. How ... ?
6. Mary works at a bookshop. Where ...
7.Mr. Johnson lives in the country. Who ... ?
8.We have six lessons on Monday. When ... ?
9. It takes me ten minutes to get to school. How long ... ?
10. My sister plays chess quite well. How ... ?