diff --git a/src/ezdxf/math/circle.py b/src/ezdxf/math/circle.py
index 5ef35e979..1f25a51eb 100644
--- a/src/ezdxf/math/circle.py
+++ b/src/ezdxf/math/circle.py
@@ -37,7 +37,7 @@ def __str__(self) -> str:
         return f"ConstructionCircle({self.center}, {self.radius})"
 
     @staticmethod
-    def from_3p(p1: UVec, p2: UVec, p3: UVec) -> "ConstructionCircle":
+    def from_3p(p1: UVec, p2: UVec, p3: UVec) -> ConstructionCircle:
         """Creates a circle from three points, all points have to be compatible
         to :class:`Vec2` class.
         """
@@ -52,7 +52,7 @@ def from_3p(p1: UVec, p2: UVec, p3: UVec) -> "ConstructionCircle":
         return ConstructionCircle(center, center.distance(_p1))
 
     @property
-    def bounding_box(self) -> "BoundingBox2d":
+    def bounding_box(self) -> BoundingBox2d:
         """2D bounding box of circle as  :class:`BoundingBox2d` object."""
         rvec = Vec2((self.radius, self.radius))
         return BoundingBox2d((self.center - rvec, self.center + rvec))
diff --git a/src/ezdxf/math/line.py b/src/ezdxf/math/line.py
index 50d69f975..366331434 100644
--- a/src/ezdxf/math/line.py
+++ b/src/ezdxf/math/line.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2010-2022, Manfred Moitzi
+# Copyright (c) 2010-2024, Manfred Moitzi
 # License: MIT License
 from __future__ import annotations
 from typing import Optional
@@ -108,7 +108,7 @@ def __repr__(self) -> str:
             "angle={0.angle:.5f})".format(self)
         )
 
-    def is_parallel(self, other: "ConstructionRay") -> bool:
+    def is_parallel(self, other: ConstructionRay) -> bool:
         """Returns ``True`` if rays are parallel."""
         if self._is_vertical:
             return other._is_vertical
@@ -119,7 +119,7 @@ def is_parallel(self, other: "ConstructionRay") -> bool:
         # guards above guarantee that no slope is None
         return math.isclose(self._slope, other._slope, abs_tol=ABS_TOL)  # type: ignore
 
-    def intersect(self, other: "ConstructionRay") -> Vec2:
+    def intersect(self, other: ConstructionRay) -> Vec2:
         """Returns the intersection point as ``(x, y)`` tuple of `self` and
         `other`.
 
@@ -158,7 +158,7 @@ def intersect(self, other: "ConstructionRay") -> Vec2:
             y = ray1.yof(x)
         return Vec2((x, y))
 
-    def orthogonal(self, location: UVec) -> "ConstructionRay":
+    def orthogonal(self, location: UVec) -> ConstructionRay:
         """Returns orthogonal ray at `location`."""
         return ConstructionRay(location, angle=self.angle + HALF_PI)
 
@@ -188,7 +188,7 @@ def xof(self, y: float) -> float:
         else:
             raise ArithmeticError
 
-    def bisectrix(self, other: "ConstructionRay") -> "ConstructionRay":
+    def bisectrix(self, other: ConstructionRay) -> ConstructionRay:
         """Bisectrix between `self` and `other`."""
         intersection = self.intersect(other)
         alpha = (self.angle + other.angle) / 2.0
@@ -260,7 +260,7 @@ def length(self) -> float:
         """Returns length of line."""
         return (self.end - self.start).magnitude
 
-    def midpoint(self) -> "Vec2":
+    def midpoint(self) -> Vec2:
         """Returns mid point of line."""
         return self.start.lerp(self.end)
 
@@ -279,8 +279,8 @@ def inside_bounding_box(self, point: UVec) -> bool:
         return self.bounding_box.inside(point)
 
     def intersect(
-        self, other: "ConstructionLine", abs_tol: float = TOLERANCE
-    ) -> Optional["Vec2"]:
+        self, other: ConstructionLine, abs_tol: float = TOLERANCE
+    ) -> Optional[Vec2]:
         """Returns the intersection point of to lines or ``None`` if they have
         no intersection point.
 
@@ -297,7 +297,7 @@ def intersect(
         )
 
     def has_intersection(
-        self, other: "ConstructionLine", abs_tol: float = TOLERANCE
+        self, other: ConstructionLine, abs_tol: float = TOLERANCE
     ) -> bool:
         """Returns ``True`` if has intersection with `other` line."""
         return self.intersect(other, abs_tol=abs_tol) is not None