From 1818911c5fcd7f276dcd080672ce8fcc81b14933 Mon Sep 17 00:00:00 2001
From: nishi <91971064+nishendra3@users.noreply.github.com>
Date: Sun, 1 Feb 2026 14:43:10 +0100
Subject: [PATCH] Measure: corrected angle measurements bug (#27254)

---
 src/Mod/Measure/App/MeasureAngle.cpp | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/Mod/Measure/App/MeasureAngle.cpp b/src/Mod/Measure/App/MeasureAngle.cpp
index 52c1299b7d..904955f7e7 100644
--- a/src/Mod/Measure/App/MeasureAngle.cpp
+++ b/src/Mod/Measure/App/MeasureAngle.cpp
@@ -233,7 +233,28 @@ App::DocumentObjectExecReturn* MeasureAngle::execute()
     Base::Vector3d vec2;
     getVec(*ob2, subs2.at(0), vec2);
 
-    Angle.setValue(Base::toDegrees(vec1.GetAngle(vec2)));
+    if (vec1.IsParallel(vec2, Base::Precision::Angular())) {
+        // handle case when both vectors are parallel
+        Angle.setValue(0);
+    }
+    else {
+        // get oriented vectors based on common origin
+        Base::Vector3d loc1 = getLoc(*ob1, subs1.at(0));
+        Base::Vector3d loc2 = getLoc(*ob2, subs2.at(0));
+        Base::Vector3d origin = (loc1 + loc2) * 0.5;
+
+        // flip if needed, to make them point away from origin
+        if ((loc1 - origin).Dot(vec1) < 0) {
+            vec1 = -vec1;
+        }
+        if ((loc2 - origin).Dot(vec2) < 0) {
+            vec2 = -vec2;
+        }
+
+        // get oriented angle wrt normal axis
+        Base::Vector3d normalAxis = (vec1.Cross(vec2)).Normalize();
+        Angle.setValue(Base::toDegrees(vec1.GetAngleOriented(vec2, normalAxis)));
+    }
 
     return DocumentObject::StdReturn;
 }