diff --git a/src/components/fabric/QPolygon.js b/src/components/fabric/QPolygon.js
index bdca82aa..43e39fd2 100644
--- a/src/components/fabric/QPolygon.js
+++ b/src/components/fabric/QPolygon.js
@@ -81,7 +81,7 @@ export default class QPolygon extends fabric.Group {
     })
 
     this.getObjects().forEach((obj) => {
-      if (obj.type === 'QLine') {
+      if (obj.type[0] === 'Q') {
         obj.setFontSize(fontSize)
       }
     })
diff --git a/src/util/canvas-util.js b/src/util/canvas-util.js
index 769329bb..51634a00 100644
--- a/src/util/canvas-util.js
+++ b/src/util/canvas-util.js
@@ -222,8 +222,16 @@ export const getRoofHypotenuse = (base) => {
   return Math.sqrt(base * base * 2)
 }
 
+/**
+ * 촌을 입력받아 각도를 반환
+ * @param chon
+ * @returns {number}
+ */
 export const getDegreeByChon = (chon) => {
-  return chon * 5.45
+  // tan(theta) = height / base
+  const radians = Math.atan(chon / 10)
+  // 라디안을 도 단위로 변환
+  return Number((radians * (180 / Math.PI)).toFixed(2))
 }
 
 /**
@@ -265,6 +273,12 @@ export const getDirectionByPoint = (a, b) => {
   }
 }
 
+/**
+ * line을 두개를 이용해서 교차점을 찾는 함수
+ * @param line1
+ * @param line2
+ * @returns {{x: number, y: number}|null}
+ */
 export function calculateIntersection(line1, line2) {
   const x1 = line1.x1,
     y1 = line1.y1,