Answer:
Explanation:
Here is english version so someone else can solve it
1. Are the given sentences true? Put an X in the appropriate box. The area of the 7 dm × 12 dm rectangle is greater than 80 dm2. YES NO A 2 cm × 3 cm rectangle has a smaller area than a 1.5 cm and 5 cm rectangle. YES NO 2. One of the sides of the rectangle is 10 cm and the other is 2 times shorter. The area of this rectangle is: A. 5 cm2 B. 30 cm2 C. 40 cm2 D. 50 cm2 3. The area of the square is 25 cm2. Calculate the side length of this square. 4. Calculate the area of the rectangle with sides 4 cm and 12 cm long. 5. The area of the rectangle is 154 cm2 and one of its sides is 7 cm. Calculate the perimeter of this rectangle. 6. Find the area of the square with a circumference of 18 dm. 7. Calculate the area of the rectangle with one side 7 dm longer and the other side 3 dm longer. 8. One side of the rectangle is 8 cm and its area is 56 cm2. Calculate the length of the other side of the rectangle.