Practice and Problem-Solving Exercises

A Practice

See Problems 1 and 2.

Tell what type(s) of symmetry each figure has. If it has line symmetry, sketch the figure and the line(s) of symmetry. If it has rotational symmetry, tell the angle of rotation.

Determine how many lines of symmetry each type of quadrilateral has. Include a sketch to support your answer.

19. rhombus
20. kite
21. square
22. parallelogram

See Problem 3.

Tell whether the subject of the photo has reflectional symmetry in a plane, rotational symmetry about a line, or both.

B Apply

25. Alphabets Use the letters of the alphabets below.

    English: ABCDEFGHIJKLMNOPQRSTUVWXYZ

    Greek: AB Γ Δ EZH Θ IK ∧ MN Ξ O Π P ∑ T ϒ Φ Χ Ψ Ω

    1. Copy the table. Classify the letters of the alphabets. You will list some letters in more than one category.
    2. Which alphabet has more symmetrical letters? Explain.

    Alphabet Symmetry

    	Type of Symmetry
    Language	Horizontal Line	Vertical Line	Point
    English	□ white square	□ white square	□ white square
    Greek	□ white square	□ white square	□ white square

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