Question

What is -pi in degrees?

Answer 1

Hint: A mathematical constant is the number $$\pi$$. It is defined as the circumference to diameter ratio of a circle, with various equivalent definitions.

Complete step-by-step answer:
The angle subtended by an arc of a circle of length equal to the radius is called a radian. If the radius of a circle is $1$ , then a $1$ radian angle determines an arc with a curved length of $1.2\pi$ radians would carry us once around the circle.
A degree (full name: degree of arc, arc degree, or arc degree) is a measurement of a plane angle in which one full rotation is 360 degrees. It is typically denoted by ${}^{\circ }$ (the degree symbol).

The angle of a full circle is divided into $360$ divisions by degrees. We go around the circle once by turning $360$ degrees.
The formula used to convert radians into degrees, is to multiply the radians by $${180}^{\circ }\pi$$radians.
 $2\pi$ radians equals ${360}^{\circ }$ degrees, while $\pi$ radians equals ${180}^{\circ }$ .
Hence -pi is $-{180}^{\circ }$ .
So, the correct answer is “ $-{180}^{\circ }$ ”.

Note: Pi is a number that is practically infinite. The number $123456$ , on the other hand, does not appear in the first million digits of pi. It's surprising because if a million digits of pi don't have the sequence $123456$ , it's the rarest number in the world.
Many mathematicians agree that saying a circle has infinite corners is more accurate than saying it has zero. It's only reasonable to assume that the infinite number of corners in a circle corresponds to the infinite number of pi digits.