Identifying Lines of Symmetry in Shapes Worksheet Download
The shapes come from a new helper written for this sheet, because the site's shape library holds only REGULAR shapes and a symmetry question is built from the irregular ones - the parallelogram, the kite, the scalene triangle and trapezoid are the shapes that have none or one. The four choices always come from four different shape families and have four different symmetry counts, so a question never offers an isosceles trapezoid against a scalene one: they differ by a few pixels of slant at this size, and the question would be unfair however correct the mathematics is. The figures are drawn squarely rather than turned, because a square tipped 45 degrees reads as a diamond and invites an argument about the reader's orientation rather than the figure.
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