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Challenge Point Symmetrical Figures
1 . Find a figure that is matched with the copied image of the figure on
a film when it is rotated 180 at point O.
What you need: Transparent Film(B9), Pen
OO
O
O OO
Discuss the properties of figures that are completely matched when
they are rotated 180 at a point.
A point symmetrical figure is a figure A D
that is completely matched with the O
original figure when turned 180 at the B C
point within the figure. The spinning
point is called the center of symmetry.
120
Challenge Point Symmetrical Figures
1 . Find a figure that is matched with the copied image of the figure on
a film when it is rotated 180 at point O.
What you need: Transparent Film(B9), Pen
OO
O
O OO
Discuss the properties of figures that are completely matched when
they are rotated 180 at a point.
A point symmetrical figure is a figure A D
that is completely matched with the O
original figure when turned 180 at the B C
point within the figure. The spinning
point is called the center of symmetry.
120
