When the pie chart represents radians, it is 180 degrees. Pancake generally refers to pi, the arc length of a semicircle = π r, where π is pi, r is radius, the corresponding radian = π r ÷ r = π (radian), and the central angle of a semicircle is 180 degrees, so π (radian) = 180 degrees.

π stands for an angle, which is a mathematical term. It represents the angle in degrees, and the fillet is 360 degrees. The number 360 is chosen as the fillet because it is easily divisible, so there will be many special integer angles, which will be very convenient in calculating the calculation problems related to angles.

Introduction:

Pie, written as π (Greek letter), is the ratio of the circumference to the diameter of a circle. This value is an infinite cyclic decimal. When calculating the circumference and area of a circle, the default value of π is generally 3. 14.

Pi is a common mathematical constant in mathematics and physics, and π is also equal to the ratio of the square of the area and radius of a circle, which is the key value to calculate the circumference, area and volume of a circle.