Square using the circle command

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examples/turtle/square_by_circle.py

import turtle

trt = turtle.getturtle()
trt.circle(100, steps=4)

turtle.exitonclick()

examples/turtle/square_by_circle_set_angle.py

import turtle

trt = turtle.getturtle()
trt.right(45)
trt.circle(100, steps=4)

turtle.exitonclick()