[021]Polygon

Polygon

p=Polygon(UP+LEFT, ORIGIN, DOWN+LEFT, RIGHT)

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RegularPolygon

p = RegularPolygon()

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RegularPolygon: start_angle

        left = RegularPolygon()
        right = RegularPolygon(start_angle=PI/2)

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RegularPolygon: n

    def regulat_test3(self):
        tracker = ValueTracker(3)

        rp = RegularPolygon(3, fill_opacity=1, fill_color=RED)
        num = DecimalNumber(3,num_decimal_places=0).next_to(rp,UP)

        def update_func(mob):
            n = int(tracker.get_value())
            new_mob = RegularPolygon(n, fill_opacity=1, fill_color=RED)
            mob.become(new_mob)
            num.set_value(n)

        self.add(rp, num)
        self.play(
            tracker.set_value, 12,
            UpdateFromFunc(rp,update_func),
            rate_func=linear, run_time=5
        )
        self.wait()