# Tikz pic angle around circle

I am trying do draw an angle around an existing circle.

For example, I can draw 10 degree angle:

% Drawing circle

% Drawing 10 degree angle sides
\foreach \x in {0,10,...,360}
{
\ifthenelse{\x=10 \OR \x=0}{\draw (0,0) coordinate (O) -- ({cos(\x)*1.3},{sin(\x)*1.3}) coordinate (Deg\x)}{\draw[] (0,0) coordinate (O) -- ({cos(\x)},{sin(\x)}) coordinate (Deg\x)};
}

% Drawing 10 degree angle
\pic["$10\degree$",draw=black, angle eccentricity=1.3, angle radius=2.5cm, ->] {angle=Deg0--O--Deg10};

I need to draw 360 degree angle. The problem is that it is drawing a "zero" angle instead of drawing a line around circle that starts at (0,0) and ends at (0,0).

% Drawing 360 degree angle
\pic["$360\degree$", angle eccentricity=1.3, angle radius=2.5cm, ->] {angle=Deg0--O--Deg360};

EDIT:

I need to keep black circle and 10 degree angle and also add 360 degree angle:

A circle with radii at each 10 degrees can be drawn with simple means:

\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\draw
\foreach \a in {0, 10, ..., 350} {
}
;
\end{tikzpicture}
\end{document}

Including the annotations:

\documentclass{article}
\usepackage{tikz}
\usepackage{siunitx}
\begin{document}
\begin{tikzpicture}
\draw
\foreach \a in {20, 30, ..., 350} {
}
(0, 0) -- (0:3cm) node[right] {\SI{360}{\degree}}
(0, 0) -- (10:3cm)
;
\draw[->] (0:2.85cm) -- (0:2.85cm);
\end{tikzpicture}
\end{document}

Next guess:

\documentclass{article}
\usepackage{tikz}
\usepackage{siunitx}
\begin{document}
\begin{tikzpicture}
(0, 0) -- (0:3cm) node[right] {\SI{360}{\degree}}
arc[start angle=0, end angle=180]
arc[start angle=180, end angle=360]
;
\end{tikzpicture}
\end{document}

## Combined version

\documentclass{article}
\usepackage{tikz}
\usepackage{siunitx}
\begin{document}
\begin{tikzpicture}
\draw
\foreach \a in {10, 20, ..., 350} {
}
%
(0, 0) -- (0:3.75cm)
(0, 0) -- (10:3.75cm)
%
(5:4cm) node {\SI{10}{\degree}}
(-30:3.7cm) node {\SI{360}{\degree}}
;

\draw[->]
;

\draw[->]
;
\end{tikzpicture}
\end{document}

• Excuse me, I explained my question wrong. I edited it. – CMTV Nov 3 '16 at 8:48
• @CMTV It is not clearer, next guess added to answer. – Heiko Oberdiek Nov 3 '16 at 9:41
• I edited my question again :) Added one more picture. – CMTV Nov 3 '16 at 9:54

Is this what you want?

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{arrows.meta}
\usepackage{siunitx}
\begin{document}
\begin{tikzpicture}