Answer:
Внешний радиус
Тогда внутренний радиус
Объем материала равен разности объемов внешнего и внутреннего шаров, то есть
A(-3, -1); B(2, -1), C(2, 3)
You can read the length of AB and BC.
|AB| = 5
|BC| = 4
Use the Pythagorean theorem:
The perimeter:
Answer: p=9
explanation: 6 reds + 3 blues = 9.
Every number that has 0 as last digit and isn't decimal number, can be divided by 10 without remainder. It works for both positive or negative numbers. If last digit is different from 0, you will have remainder equal to that last digit. Even number 0 is divisible by 10 (the answer is 0 of course) because its last and only digit is 0.