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Class 7 Symmetry — practice questions with answers

Geometry · 5 sample questions from the school syllabus. Try each one, then open the answer and the worked solution.

1. How many lines of symmetry does an equilateral triangle have?
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Answer: C) 3
An equilateral triangle has three lines of symmetry, each passing through a vertex and the midpoint of the opposite side.
2. A kite has how many lines of symmetry?
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Answer: A) 1
A kite has one line of symmetry, which passes through its longer diagonal.
3. The number of times a figure fits exactly onto itself during one full turn of 360 degrees is called the ______ of rotational symmetry.
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Answer: A) order
This count is called the order of rotational symmetry (or simply the order of rotation).
4. A semicircle has how many lines of symmetry?
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Answer: C) 1
A semicircle has exactly 1 line of symmetry: the perpendicular line through the midpoint of its straight edge (the diameter).
5. The angle of rotation of a square is 90 degrees and that of an equilateral triangle is 120 degrees. By how many degrees is the triangle's angle of rotation greater than the square's?
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Answer: C) 30
Square's angle = degrees; triangle's angle = degrees. The difference is 120 - 90 = 30 degrees.
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