Four times a square number is again a square number because when you square a number, you are essentially multiplying the number by itself. So when you square a number, you get a perfect square. When you multiply a perfect square by 4, you are essentially doubling the number and then squaring it again, which results in another perfect square. This is because squaring a number and then multiplying it by 4 is equivalent to squaring the number and then multiplying the result by 16. Therefore, four times a square number is again a square number. **

The energy consumption of a 70 square meter old building apartment can vary depending on several factors such as insulation, heating and cooling systems, and the energy efficiency of appliances. On average, an old building apartment of this size may consume around 150-200 kWh per square meter annually for heating, lighting, and other electrical appliances. However, this can be significantly reduced through energy-efficient upgrades such as insulation, energy-efficient windows, and modern heating and cooling systems. It is important to conduct an energy audit to accurately assess the energy consumption and identify opportunities for improvement. **

No, a square meter times a square meter is not equal to a cubic meter. A square meter represents an area, while a cubic meter represents a volume. To find the volume of a cube, you would need to multiply the area of the base (in square meters) by the height (in meters), resulting in cubic meters. **

To arrange four pictures in a square, you can place one picture in each corner of the square. Alternatively, you can arrange the pictures in a 2x2 grid, with two pictures on the top row and two on the bottom row. Another option is to arrange the pictures in a 2x2 grid, with two pictures on the left column and two on the right column. Finally, you can arrange the pictures in a 1x4 row, with all four pictures placed side by side. **

A square is also considered a kite with four corners because a kite is defined as a quadrilateral with two distinct pairs of adjacent sides that are congruent. In a square, all four sides are congruent, and it also has two distinct pairs of adjacent sides that are congruent, making it fit the definition of a kite. Additionally, a square can be seen as a special case of a kite where all four sides are equal in length and all angles are right angles. Therefore, a square can be classified as a specific type of kite with four corners. **

To calculate the energy consumption per square meter per year at 28000 kWh, we need to know the total square meters of the space. Let's assume the space is 100 square meters. To find the energy consumption per square meter, we would divide the total energy consumption by the total square meters: 28000 kWh / 100 sqm = 280 kWh/sqm per year. This means that the energy consumption per square meter per year, including hot water, at 28000 kWh is 280 kWh. **

There are 10,000 square centimeters in a square meter. This is because a square meter is equal to 100 centimeters on each side, resulting in a total area of 10,000 square centimeters. This conversion is useful when working with different units of area measurement. **

A square meter is a unit of area measurement in the metric system. It is defined as the area of a square with sides that are each one meter long. One square meter is equal to 10.76 square feet. It is commonly used to measure the size of indoor spaces, such as rooms in a house or office, as well as outdoor spaces like yards or gardens. **