Предмет: Математика, автор: JONi98

Найти площадь поверхности и объем куба, длина ребра которого равно 12 см. Помогите пожалуйста.!

Ответы

Автор ответа: vmaluga2011
0
V=а*а*а, где V - объем, а - ребро (объем равен кубу длины ребра)
V=12 см*12 см*12 см=1728 см3 (см3 - кубический сантиметр)
S=6а2, где S - площадь поверхности, а2 - длина ребра в квадрате
S=6*12 см*12 см=864 см2 (см2 - квадратный сантиметр)
Ответ: объем куба равен 1728 см3, площадь поверхности куба равна 864 см2
Похожие вопросы
Предмет: Английский язык, автор: Onivaa
What _____ he do at weekends?
A) do B) is C) does D) are
52. He plays football _____ Friday mornings.
A) in B) on C) at D) of
53. Do you relax _____ weekends?
A) at B) on C) in D) by
54. Where do you go _____ holiday?
A) at B) in C) of D) on
55. I like _____ .
A) cooks B) cooking C) cook D) cooked
56. She gets up early _____ the morning.
A) on B) in C) at D) by
57. She gets up early _____ the weekdays.
A) at B) of C) on D) in
58. He takes photos only _____ spring.
A) in B) at C) on D) by
59. He hates _____ football _____ television.
A) watching / on B) to watch / in
C) watch / on D) watching / in
60. They like _____ very much.
A) sail B) sailed C) sailing D) sail
61. My brother’s birthday is _____ March.
A) in B) on C) at D) to
62. The train leaves Paris _____ 4 p.m.
A) in B) at C) on D) by
63. Vancouver is very cold _____ winter.
A) at B) in C) on D) to
64. Sometimes we _____ cards.
A) plays B) playing C) play D) to play
65. She never _____ meat.
A) eats B) eating C) eat D) to eat
66. We always _____ lemonade in the evenings.
A) to drink B) has C) drinking D) have
67. A: I’m sorry. I’m late.
B: _____ Come and sit down.
A) Excuse me! B) Don’t worry!
C) What’s the matter? D) Why are you late?
68. A- _____ your wife _____ English?
B- Yes, she does.
A) Do / speak B) Does / speaking
C) Does / speak D) Do / speaking
69. “How many languages _____ you _____ ?”
“Three: English, German and Spanish.”
A) does / speak B) do / speak
C) do / speaking D) does / speaking
70. Why _____ you like _____ in the hotel?
A) do / working B) do / work
C) does / working D) does / work
Предмет: Геометрия, автор: nphoenix34
Предмет: Алгебра, автор: iterator