The brand of an ice cream shop, as shown in the picture, consists of three quarters of a circle with a radius of 2 feet placed on an isosceles triangle with a height of 5 feet. What is the circumference of this brand?
This question is not difficult,
The circumference of the arc is 3/4×(3. 14×2×r),
The waist length of a triangle is l=√(5? +2)
The perimeter can be found.