diff --git a/src/components/fabric/QLine.js b/src/components/fabric/QLine.js
index af9dd7a4..48680343 100644
--- a/src/components/fabric/QLine.js
+++ b/src/components/fabric/QLine.js
@@ -17,7 +17,7 @@ export const QLine = fabric.util.createClass(fabric.Line, {
   initialize: function (points, options, length = 0) {
     // 소수점 전부 제거
 
-    points = points.map((point) => Number(point?.toFixed(1)))
+    points = points.map((point) => Number(point).toFixed(1))
 
     this.callSuper('initialize', points, { ...options, selectable: options.selectable ?? true })
     if (options.id) {
diff --git a/src/components/fabric/QPolygon.js b/src/components/fabric/QPolygon.js
index b50cdaa3..e1c80f4d 100644
--- a/src/components/fabric/QPolygon.js
+++ b/src/components/fabric/QPolygon.js
@@ -710,14 +710,14 @@ export const QPolygon = fabric.util.createClass(fabric.Polygon, {
   inPolygonImproved(point) {
     const vertices = this.points
     let inside = false
-    const testX = Number(point.x.toFixed(this.toFixed))
-    const testY = Number(point.y.toFixed(this.toFixed))
+    const testX = Number(point.x).toFixed(this.toFixed)
+    const testY = Number(point.y).toFixed(this.toFixed)
 
     for (let i = 0, j = vertices.length - 1; i < vertices.length; j = i++) {
-      const xi = Number(vertices[i].x.toFixed(this.toFixed))
-      const yi = Number(vertices[i].y.toFixed(this.toFixed))
-      const xj = Number(vertices[j].x.toFixed(this.toFixed))
-      const yj = Number(vertices[j].y.toFixed(this.toFixed))
+      const xi = Number(vertices[i].x).toFixed(this.toFixed)
+      const yi = Number(vertices[i].y).toFixed(this.toFixed)
+      const xj = Number(vertices[j].x).toFixed(this.toFixed)
+      const yj = Number(vertices[j].y).toFixed(this.toFixed)
 
       // 점이 정점 위에 있는지 확인
       if (Math.abs(xi - testX) < 0.01 && Math.abs(yi - testY) < 0.01) {
diff --git a/src/util/canvas-util.js b/src/util/canvas-util.js
index 0af492a1..dc3b3c93 100644
--- a/src/util/canvas-util.js
+++ b/src/util/canvas-util.js
@@ -342,6 +342,14 @@ export const findIntersection1 = (line1, line2) => {
 }
 
 export const calculateIntersection = (line1, line2) => {
+  line1.x1 = Number(line1.x1)
+  line1.y1 = Number(line1.y1)
+  line1.x2 = Number(line1.x2)
+  line1.y2 = Number(line1.y2)
+  line2.x1 = Number(line2.x1)
+  line2.y1 = Number(line2.y1)
+  line2.x2 = Number(line2.x2)
+  line2.y2 = Number(line2.y2)
   const result = intersect([line1.x1, line1.y1], [line1.x2, line1.y2], [line2.x1, line2.y1], [line2.x2, line2.y2])
   if (!result) {
     return null