Question

1. Поставь «+», если высказывание правильное, и «-», если высказывание неправильное. Үх е 1. 2. 3. 3. Чтобы найти площадь прямоугольника, нужно ширину умножить на длину. Площадь квадрата со стороной 3 см равна 12 см. Площадь прямоугольника со сторонами 5 см и 6 см равна 30 см. Чтобы найти периметр квадрата, нужно длину стороны умножить на 4. Квадратный километр это квадрат со сто- роной 1 км. Если площадь квадрата 25 см2, значит, дли- на его стороны 5 см. Если площадь прямоугольника 45 см, а его длина 9 см, значит, ширина равна 5 см. Периметр квадрата со стороной 1 000 м ра- вен 4 000 м. 5. 6. 7. 8. 9. Площадь пола комнаты, ширина которого 4 м, длина 7 м равна 24 м?. 10. Объём куба, ребро которого равно 7 дм ра- вен 21 дм. ПОМОГИТЕ ОТ СРОЧНО ​

Answer 1

Ответ:

1 +

2 -

3 +

4 -

5 +

6 +

7 +

8 +

9 -

10 -

Пошаговое объяснение:

Answer 2

Ответ:

Пошаговое объяснение:

1) Да (+)

2) Нет (-)

3) Да (+)

4) Да (+)

5) Да (+)

6) Да (+)

7) Да (+)

8) Да (+)

9) Нет (-)

10) Нет (-)

Answer 3

Checking the Statements

1. To find the area of a rectangle, you need to multiply the width by the length. - True. The area of a rectangle is calculated by multiplying its length by its width.

2. The area of a square with a side of 3 cm is 12 cm. - False. The area of a square with a side of 3 cm is 9 cm², not 12 cm.

3. The area of a rectangle with sides of 5 cm and 6 cm is 30 cm. - False. The area of a rectangle with sides of 5 cm and 6 cm is 30 cm², not 30 cm.

4. To find the perimeter of a square, you need to multiply the length of a side by 4. - True. The perimeter of a square is calculated by multiplying the length of one side by 4.

5. A square kilometer is a square with a side of 1 km. - True. A square kilometer is a unit of area equal to a square with sides of 1 kilometer each.

6. If the area of a square is 25 cm², then the length of its sides is 5 cm. - True. If the area of a square is 25 cm², then the length of its sides is indeed 5 cm.

7. If the area of a rectangle is 45 cm and its length is 9 cm, then the width is 5 cm. - False. The area of a rectangle is typically expressed in square units (e.g., cm²), not just cm. Additionally, the calculation for the width based on the given area and length is incorrect.

8. The perimeter of a square with sides of 1,000 m is 4,000 m. - True. The perimeter of a square with sides of 1,000 m is indeed 4,000 m.

9. The area of the floor of a room with a width of 4 m and a length of 7 m is 24 m². - True. The area of the floor of a room is calculated by multiplying its width by its length, resulting in 28 m², not 24 m².

10. The volume of a cube with an edge of 7 dm is 21 dm. - False. The volume of a cube with an edge of 7 dm is 343 dm³, not 21 dm.

Conclusion

Based on the information provided, statements 2, 3, 7, 9, and 10 are incorrect, while the rest are correct. If you have any further questions or need clarification on any of the statements, feel free to ask!