diff --git a/src/theme/obsidian.ts b/src/theme/obsidian.ts
index fdc50ab..523e4af 100644
--- a/src/theme/obsidian.ts
+++ b/src/theme/obsidian.ts
@@ -147,6 +147,13 @@ JXG.themes['obsidian'] = {
     },
   },
 
+  bisector: {
+    strokeColor: interactiveAccent,
+    highlightStrokeColor: interactiveAccentHover,
+    straightLast: false,
+    dash: 2,
+  },
+
   arc: {
     strokeColor: interactiveAccent,
     highlightStrokeColor: interactiveAccentHover,
@@ -204,6 +211,17 @@ JXG.themes['obsidian'] = {
     },
   },
 
+  incircle: {
+    strokeColor: interactiveAccent,
+    highlightStrokeColor: interactiveAccentHover,
+    center: {
+      fillColor: interactiveAccent,
+      strokeColor: interactiveAccent,
+      highlightFillColor: interactiveAccentHover,
+      highlightStrokeColor: interactiveAccentHover,
+    },
+  },
+
   circumcirclearc: {
     strokeColor: interactiveAccent,
     highlightStrokeColor: interactiveAccentHover,
@@ -241,17 +259,6 @@ JXG.themes['obsidian'] = {
     highlightStrokeColor: interactiveAccentHover,
   },
 
-  incircle: {
-    highlightFillColor: 'none',
-    highlightStrokeColor: interactiveAccentHover,
-    center: {
-      fillColor: interactiveAccent,
-      strokeColor: interactiveAccent,
-      highlightFillColor: interactiveAccentHover,
-      highlightStrokeColor: interactiveAccentHover,
-    },
-  },
-
   inequality: {
     fillColor: interactiveAccent,
   },
@@ -291,10 +298,12 @@ JXG.themes['obsidian'] = {
 
   perpendicular: {
     strokeColor: interactiveAccent,
+    dash: 2,
   },
 
   perpendicularsegment: {
     strokeColor: interactiveAccent,
+    dash: 2,
   },
 
   point: {