Draw a triangle

 turtle import Turtle
elena = Turtle()

def triangArea(sideA,sideB,sideC):
    return (sideA+sideB+sideC)/2

def triangPerimeter(sideA,sideB,sideC):
    return (sideA+sideB+sideC)

# Write a little
elena.color('red')
elena.penup()
elena.goto(-20,-10)
elena.write("Let's make a equilateral triangle!")
elena.goto(0,50)
elena.pendown()

def draw_triangle(elena,c):
    elena.color(c)
    elena.begin_fill()
    elena.left(0)
    elena.forward(150)
    elena.left(120)
    elena.forward(150)
    elena.left(120)
    elena.forward(150)
    elena.end_fill()

# Draw the area
    elena.penup()
    elena.goto(0, 120)
    elena.pendown()
    elena.color("green")
    elena.write("Area of triangle: " + str(triangArea(200, 200,200)))
# Draw the perimeter
    elena.penup()
    elena.goto(0, 100)
    elena.pendown()
    elena.color("purple")
    elena.write("Perimeter of triangle: " + str(triangPerimeter(200, 200,200)))

draw_triangle(elena, "orange")