How many square centimeters of iron sheet does it take to make a triangle warning sign with a bottom of 60 cm and a height of 52 cm? How many such warning signs can be made of a parallelogram sheet of iron with a bottom of 180cm and a height of 52cm?

RELATED INFORMATIONS

• 1. A piece of iron sheet is 3 meters long and 2.34 meters wide. How many triangle traffic signs can be made with it, 9 decimeters at the bottom and 7.8 decimeters at the height? (splicing is not allowed)
• 2. Cut a triangle from a trapezoid with an upper bottom of 5 cm and a lower bottom of 8 cm and a height of 6 cm. The maximum area of the triangle is () square cm A15 b；19.5 c；24
• 3. The difference between the two right sides of a right triangle is 3cm, and the area is 9cm ^ 2. Find the length of the longer right side
• 4. It is known that the area of a right triangle is 108 square centimeters, and the ratio of the lengths of the two right sides is 2:3. The lengths of the two right sides are calculated respectively
• 5. If we know that the sum of the right sides of a right triangle is 20cm, then the maximum area of the right triangle is
• 6. ------It is known that the area of a right triangle is 10 √ 3cm square, and the length of one right side is 3 √ 2cm
• 7. Put two identical triangles together into a parallelogram. The side lengths of the triangles are 7cm, 6cm and 3cm respectively. The parallelogram is made of two identical triangles The longest is () cm and the shortest is () cm
• 8. Cut a parallelogram into two figures, and then put it together into a triangle. What is the triangle? There are several ways to cut and put it together
• 9. If the two sides of a triangle are 5 cm and 8 cm long respectively, how many cm (whole centimeter) may the other side be
• 10. A triangle vegetable field, the ratio of side length is 3:4:5, perimeter is 84 meters, the shortest side length______ Rice
• 11. The numbers 1, 2 in the triangle sign on the bottom of plastic products Which of these numbers on the bottom of plastic products can be used to hold boiling water? Which of them will be poisonous? Which of them can be used to hold soy sauce and vinegar? Which of them can't be used to hold food? In short, what are the uses, advantages and disadvantages of the products represented by these numbers?
• 12. The bottom of a triangle warning sign is 1.8 meters and the height is 1.5 meters. What's the area of this warning sign?
• 13. At the entrance of the experimental primary school, there is a triangle warning sign with the bottom edge of 0.5 meters long and 0.7 meters high Paint, 0.85 kg per square meter. How many kg of paint do you need?
• 14. A triangular billboard with a bottom length of 10m and 4m. If you want to paint the billboard, paint it 0 A triangle billboard, bottom length 10m, 4m. If you want to paint this billboard, every 75kg of paint per square meter. How many kg of paint should be used for this billboard? (keep the whole kilogram)
• 15. There is a triangular traffic sign. Paint both sides of it. Use 1.2kg of paint. Paint 0.6kg per square meter. The height of the triangle It's 0.8 meters, how long is its bottom edge
• 16. A rectangular iron plate weighs 425kg, 5 meters long, 2 meters wide and 6 cm thick. How many grams does each cubic centimeter iron plate weigh?
• 17. The area and height of a triangle and a parallelogram are equal. It is known that the bottom of a triangle is 5M and the bottom of a parallelogram is 5m
• 18. The bottom length of a parallelogram is 5m, 5m. What is its area
• 19. The area of a triangle is 7.5 square meters, and the area of a parallelogram with the same base and height is () the bottom of a parallelogram is 5 meters, and the height of a parallelogram is 5 meters
• 20. The bottom of a parallelogram steel plate is 3 or 8 meters, and the height is 1 or 5 meters. What is the area of this parallelogram steel plate?