Tweak angles

documentation/proposals/Proposal - 3.0 Additional math types - Angle.md

@@ -43,18 +43,24 @@ public readonly struct Angle<T>
     , ISubtractionOperators<Angle<T>,Angle<T>,Angle<T>>
     , IParsable<Angle<T>>
     , ISpanParsable<Angle<T>>
+    , IUtf8SpanParsable<Angle<T>>
+    , IFormattable
+    , IUtf8SpanFormattable
     where T : IFloatingPointIeee754<T>
 {
 
     public readonly T TotalRadians;
 
     public Angle(T totalRadians) { }
 
-
+    /// <summary>Angle in degrees in the range [0, 360].</summary>
     public T Degrees { get; }
+    /// <summary>Total angle in degrees.</summary>
     public T TotalDegrees { get; }
-    public T TotalRdians { get; }
-    public T Milliradians { get; }
+    /// <summary>Angle in radians in range [π, -π].</summary>
+    public T Radians { get; }
+
+    public T Hours { get; }
     public T Minutes { get; }
     public T Seconds { get; }
 
@@ -185,10 +191,7 @@ public static class Angle
     public static Angle<T> FromDegrees<T>(T degrees)
         where T : IFloatingPointIeee754<T>
          => default;
-    public static Angle<T> FromGradians<T>(T gradians)
-        where T : IFloatingPointIeee754<T>
-         => default;
-    public static Angle<T> FromMilliradians<T>(T milliradians)
+    public static Angle<T> FromHours<T>(T hours)
         where T : IFloatingPointIeee754<T>
          => default;
     public static Angle<T> FromMinutes<T>(T minutes)
@@ -198,6 +201,10 @@ public static class Angle
         where T : IFloatingPointIeee754<T>
          => default;
 
+    public static Angle<T> FromTimeSpan<T>(TimeSpan timeSpan)
+        where T : IFloatingPointIeee754<T>
+         => default;
+
     public static Angle<T> Min<T>(Angle<T> left, Angle<T> right) 
         where T : IFloatingPointIeee754<T>
         => default;