@@ -0,0 +1,67 @@
+# Convert Kilometres to Miles, Convert Celsius to Fahrenheit, convert degrees to radians, convert to inches.
+
+
+# Kilometres to Miles
+
+import math
+
+
+def kiloToMiles():
+
+    kilometers = float(input("Enter value in kilometers"))
+
+    # conversion factor
+    conv_fac = 0.621371
+
+    miles = kilometers * conv_fac
+    print('%0.3f kilometers is equal to %0.3f miles' % (kilometers, miles))
+
+
+def celsiusToFahrenheit():
+
+    Celsius = float(input("Enter value in Celsius"))
+
+    # conversion factor
+    Fahrenheit = 9.0 / 5.0 * Celsius + 32
+
+    print('%0.3f Celsius is equal to %0.3f Fahrenheit' % (Celsius, Fahrenheit))
+
+
+def degreesToradians():
+
+    degrees = float(input("Enter value in degrees"))
+
+    # conversion factor
+    radians = math.pi * degrees / 180
+
+    print('%0.3f Degrees is equal to %0.3f Radians' % (degrees, radians))
+
+
+def centimetersToinches():
+    centimeters = float(input("Enter value in Centimeters"))
+
+    # conversion factor
+    inches = centimeters * 0.3937
+
+    print('%0.3f Centimeters is equal to %0.3f inches' % (centimeters, inches))
+
+
+if __name__ == "__main__":
+    print("Enter A Number (1-4) to Choose How to Convert:")
+    print("1: Kilometres to Miles")
+    print("2: Celsius to Fahrenheit")
+    print("3: Degrees to Radians")
+    print("4: Centimeters to Inches")
+
+    user_input = int(input("Enter Here: "))
+    if user_input == 1:
+        kiloToMiles()
+    elif user_input == 2:
+        celsiusToFahrenheit()
+    elif user_input == 3:
+        degreesToradians()
+    elif user_input == 4:
+        centimetersToinches()
+    else:
+        print("Input is illegal !")
+
@@ -0,0 +1,91 @@
+from tkinter import *
+from tkinter import messagebox
+import math
+
+class Convert_1():
+
+	def __init__(self):
+		self.mainwindows = Tk()
+		ws = self.mainwindows.winfo_screenwidth()    # Get the monitor width
+		hs = self.mainwindows.winfo_screenheight()    # Get the monitor height
+		w = 600    # The width of the program
+		h = 500    # The height of the program
+		x = (ws / 2) - (w / 2)
+		y = (hs / 2) - (h / 2)
+		self.mainwindows.geometry("%dx%d+%d+%d" % (w, h, x, y))    # Centered
+		self.mainwindows.title("")   # The title of the program,Is now empty,Please enter yourself
+		# self.mainwindows.config(bg="#222")    # background
+
+	def kiloToMiles(self,kilometers):
+
+		# conversion factor
+		conv_fac = 0.621371
+
+		miles = float(kilometers) * conv_fac
+		self.return_value_Text.delete(0.0, END)    # Empty the content
+		self.return_value_Text.insert(END,'%0.3f kilometers is equal to %0.3f miles' % (kilometers, miles))    # Write content
+
+	def celsiusToFahrenheit(self,Celsius):
+
+		# conversion factor
+		Fahrenheit = 9.0 / 5.0 * Celsius + 32
+
+		self.return_value_Text.delete(0.0, END)    # Empty the content
+		self.return_value_Text.insert(END,'%0.3f Celsius is equal to %0.3f Fahrenheit' % (Celsius, Fahrenheit))    # Write content
+
+	def degreesToradians(self,degrees):
+
+		# conversion factor
+		radians = math.pi * degrees / 180
+
+		self.return_value_Text.delete(0.0, END)    # Empty the content
+		self.return_value_Text.insert(END,'%0.3f Degrees is equal to %0.3f Radians' % (degrees, radians))    # Write content
+
+	def centimetersToinches(self,centimeters):
+
+		# conversion factor
+		inches = centimeters * 0.3937
+
+		self.return_value_Text.delete(0.0, END)    # Empty the content
+		self.return_value_Text.insert(END,'%0.3f Centimeters is equal to %0.3f inches' % (centimeters, inches))    # Write content
+
+	def ConfirmtheCalculation(self):
+		choose = self.var.get()
+		user_input_value = self.Enter_Entry.get()
+		if choose == 0:
+			messagebox.showinfo(title="Remind",message="Please select an option")    # There is no choice of conversion button, jump out of the prompt
+		elif user_input_value.strip() == "":
+			messagebox.showinfo(title="Remind", message="Please enter the value to be converted")    # No input, jump out of the prompt box
+		elif [value for value in user_input_value if value.isalpha()] != []:
+			messagebox.showinfo(title="Remind", message="Please enter a number, not a string")    # The contents of the input string, jump out of the prompt box
+		elif choose == 1:    # If selected Kilometres to Miles
+			self.kiloToMiles(int(user_input_value))
+		elif choose == 2:    # If selected Celsius to Fahrenheit
+			self.celsiusToFahrenheit(int(user_input_value))
+		elif choose == 3:    # If selected Degrees to Radians
+			self.degreesToradians(int(user_input_value))
+		elif choose == 4:    # If selected Centimeters to Inches
+			self.centimetersToinches(int(user_input_value))
+		else:
+			pass  # Easy to expand
+
+
+	def main(self):
+		self.var = IntVar()    # Initialize options
+		remind_label = Label(self.mainwindows,text="Select the button to convert",font=("宋体",25)).pack()
+		KTM_btn = Radiobutton(self.mainwindows,text="Kilometres to Miles",variable=self.var,value=1,font=("宋体",15)).place(x=30,y=40)    # Kilometres to Miles Button
+		CTF_btn = Radiobutton(self.mainwindows,text="Celsius to Fahrenheit",variable=self.var,value=2,font=("宋体",15)).place(x=30,y=70)    # Celsius to Fahrenheit Button
+		DTR_btn = Radiobutton(self.mainwindows,text="Degrees to Radians",variable=self.var,value=3,font=("宋体",15)).place(x=350,y=40)    # Degrees to Radians Button
+		CTI_btn = Radiobutton(self.mainwindows,text="Centimeters to Inches",variable=self.var,value=4,font=("宋体",15)).place(x=350,y=70)    # Centimeters to Inches Button
+		Enter_label = Label(self.mainwindows,text="Enter Here: ",font=("宋体",20)).place(x=40,y=150)    # Enter the prompt
+		self.Enter_Entry = Entry(self.mainwindows,font=("宋体",25))    # Enter the value of the conversion
+		self.Enter_Entry.place(x=220,y=150)
+		Entry_button = Button(self.mainwindows,text="Confirm the Calculation",font=("宋体",20),relief="solid",command=self.ConfirmtheCalculation).place(x=150,y=250)    # Confirm the Calculation Button
+		self.return_value_Text = Text(self.mainwindows,width=34,height=4,font=("宋体",25),relief="solid")    # The value after conversion is output here
+		self.return_value_Text.place(x=10,y=350)
+		self.mainwindows.mainloop()    # while~
+
+
+if __name__ == '__main__':
+	convert = Convert_1()
+	convert.main()
@@ -0,0 +1,66 @@
+# Calculate the area of a Triangle, rectangle, circle, trapezoid.
+
+
+import math
+
+
+def triangle():
+
+    a = float(input('Enter first side: '))
+    b = float(input('Enter second side: '))
+    c = float(input('Enter third side: '))
+
+    s = (a + b + c) / 2
+
+    area = (s * (s - a) * (s - b) * (s - c)) ** 0.5
+    print('The area of the triangle is %0.2f' % area)
+
+
+def rectangle():
+
+    a = float(input('Enter length of side A: '))
+    b = float(input('Enter length of side B: '))
+
+    area = a*b
+
+    print('The area of the rectangle is %0.3f' % area)
+
+
+def circle():
+    r = float(input('Enter radius of the circle: '))
+
+    # conversion factor
+    area = math.pi * r * r
+
+    print('The area of the circle is %0.3f' % area)
+
+
+def trapezoids():
+    base1 = float(input('Enter the First Base of a Trapezoid: '))
+    base2 = float(input('Enter the Second Base of a Trapezoid: '))
+    height = float(input('Enter the Height of a Trapezoid: '))
+
+    Area = 0.5 * (base1 + base2) * height
+
+    print("Area of a Trapezium = %.3f " % Area)
+
+
+if __name__ == "__main__":
+    print("Enter A Number (1-4) to Choose How to Convert:")
+    print("1: Area of triangle")
+    print("2: Area of rectangle")
+    print("3: Area of circle")
+    print("4: Area of trapezoids")
+
+    user_input = int(input("Enter Here: "))
+    if user_input == 1:
+        triangle()
+    elif user_input == 2:
+        rectangle()
+    elif user_input == 3:
+        circle()
+    elif user_input == 4:
+        trapezoids()
+    else:
+        print("Input is illegal !")
+