diff --git a/day3/excersise.py b/day3/excersise.py
index 4b578a0..e510b01 100644
--- a/day3/excersise.py
+++ b/day3/excersise.py
@@ -1,5 +1,9 @@
+
+# 1
 age:int             = 20
+# 2
 height: float       = 1.76
+# 3
 complexNum: complex = 1 + 3j
 
 def areaOfTriangle(base:float, height: float) -> float:
@@ -9,11 +13,11 @@ def sideOfTriangle(a: int, b: int, c: int) -> int:
     return (a+b+c)
 
 def dataOfRectangle(length: float, width: float) -> [float, float]:
-    return [length*width, (2*(lenght+width))]
+    return [length*width, (2*(length+width))]
 
 def dataOfCircle(radius:float) -> [float, float]:
     pi = 3.14
-    return [pi * (r**2), (2*pi)*(radius*2)]
+    return [pi * (radius**2), pi*(radius*2)]
 
 def slopeOne(a:float, b:float) -> (float,float,float):
     slope =     a
@@ -31,8 +35,8 @@ def eucDist(p1:float,p2:float) -> float:
     x2,y2 = p2
     return ((x2 - x1)**2 + (y2 - y1)**2)**(1/2)
 
-def y(x:float):
-    return ((x**2) + (6*x) + 9)
+def f(x:float):
+    return ((x*x) + (6*x) + 9)
 
 def findLength(string1: str, string2:str) -> bool:
     return (len(string1) == len(string2))
@@ -44,7 +48,7 @@ def isInSentence(string1:str, string2:str) -> bool:
     return (string1 in string2)
 
 def convertLenght(string: str) -> str:
-    return (str)(float)(len(string))
+    return (str)((float)(len(string)))
 
 def divAndRem(number:int) -> bool:
     return (number % 2 == 0)
@@ -70,8 +74,27 @@ def table(num: int):
         new_list.append(new_list[-1]*new_list[0])
     return new_list
     
+# 4
+tri_base = int(input("Enter base: "))
+tri_heig = int(input("enter height: "))
+print("The area of triangle is:", areaOfTriangle(tri_base, tri_heig))
 
+# 5
+tri_a = int(input("Enter side a: "))
+tri_b = int(input("Enter side b: "))
+tri_c = int(input("Enter side c: "))
+print("The perimeter of triangle is:", sideOfTriangle(tri_a,tri_b,tri_c))
 
+# 6
+rec_w = int(input("\nEnter width of rectangle:  "))
+rec_h = int(input("Enter height of rectangle: "))
+recData = dataOfRectangle(rec_w,rec_h)
+print(f"Area of rectangle is {recData[0]}\nPerimeter of rectangle is {recData[1]}.\n")
+
+# 7
+cir_radius = int(input("Enter radius of a circle: "))
+dataCir = dataOfCircle(cir_radius)
+print(f"Area of circle: {dataCir[0]}\nCircumference of circle is: {dataCir[1]}\n")
 
 # 8, 9, 10 SLOPE
 
@@ -87,6 +110,30 @@ print(f"Slope2: {m2}\nDistance: {dist}")
 print(f"Are slops ecual? {m1==m2}\n")
 
 # 11 VALUE OF Y
+print(f"y = {f(2)}")
+print(f"{f(-3)} = 0\n")
+
+# 12 LENGTH AND COMPARISON
+l_str1 = "python"
+l_str2 = "dragon"
+print(f"are {l_str1} and {l_str2} equal?", findLength(l_str1, l_str2))
+
+# 13 AND
+print(f"is 'on' in {l_str1} and in {l_str2}?", onIsInSentence(l_str1,l_str2))
+print()
+
+# 14 substrings
+string = "I hope this course is not full of jargon"
+substring = "jargon"
+print(f"is {substring} in {string}", isInSentence(substring, string))
+print()
+
+# 15 NOT
+print(f"is 'on' not in {l_str1} and in {l_str2}?", not onIsInSentence(l_str1,l_str2))
+
+# 16 Convert length to float and then to string
+convertedLength = convertLenght(l_str1)
+print(f"Length in {l_str1} is\n{type(convertedLength)} -> {convertedLength}")
 
 # 18 Floor Division
 floor_num1 = 7