The height of the circular arch must reach 2.4 meters to reach the standard. The perimeter of the door frame of the circular arch is about 10 meter. Does its height meet the requirements?
The radius of the arch should be greater than or equal to 2.4 meters, that is, the radius should be at least 2.4 meters. According to this minimum value, the circumference of the arch should be at least 3.14 * 2.4+2.4 * 2 =13.336m, 10.