| Symbol | Format | Data |
|---|---|---|
| τ | Code Point |
U+03C4 |
| TeX |
\tau |
|
| SVG | Download ↓ |
The Greek small letter τ (tau) is used in math as a circle constant to represent a full rotation around a circle in radians. The value of is approximately and can be calculated by dividing any circle’s circumference by its radius.
Read more about the circle constant (tau) here.
The capital Greek letter tau (Τ) is visually very similar to the Latin capital letter T. Refer to Capital T for how the symbol appears in math.
The circle constant τ (tau) is a geometric constant approximately equal to 6.283. The numeric value is defined as the length of any circle's circumference divided by the length of its radius.
The radian angle system is a unit of measure for angles. To measure an angle in radians, divide the arc length of the angle by the radius used to draw the arc. A full rotation is equal to 2π radians.
The area of a circle is given by the geometric constant π (pi) multiplied by the radius of the circle squared (A = πr²).
The circumference of a circle is given the constant π (pi) multiplied by two times the radius of the circle.