Page 28 - 新思维数学活动用书5 样章

2.2 Symmetry

9 This is a chessboard.
a How many lines of symmetry does a

chessboard have?

b Where could you place a counter on the
chessboard so that the chessboard still has

two lines of symmetry?
Mark the place with a circle.

c Where could you place a counter on the

chessboard so that the chessboard has no
lines of symmetry?

Mark the place with a cross.
d Where could you place a counter on the chessboard so that the chessboard has

only one line of symmetry?

Mark the place with a triangle.
10 a Colour two more squares so that this pattern has exactly 1 line of symmetry.

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