QUESTION IMAGE
Question
reflection symmetry
students: keep in editing mode. (do not click present.)
organize the figures according to how many lines of symmetry, from greatest to least. you may want to experiment by clicking a figure and then clicking “arrange,” “rotate”, and flipping.
use the line tool to draw each line of symmetry. you may need to zoom in.
last fill in the name of the figure and how many lines of symmetry it has.
place figures here
name of figure type here type here type here type here type here type here type here type here type here type here
how many lines? type here type here type here type here type here type here type here type here type here type here
greatest ← number of lines of symmetry → least
figure bank
Step1: Recall line - symmetry rules
A circle has an infinite number of lines of symmetry.
Step2: Analyze regular polygons
A regular pentagon has 5 lines of symmetry, a regular hexagon has 6 lines of symmetry, a square has 4 lines of symmetry, a rectangle has 2 lines of symmetry, an isosceles triangle has 1 line of symmetry, an equilateral triangle has 3 lines of symmetry, a parallelogram has 0 lines of symmetry, a trapezoid (non - isosceles) has 0 lines of symmetry, a star (assuming a regular 5 - pointed star) has 5 lines of symmetry.
Step3: Organize from greatest to least
Circle (infinite lines), Regular hexagon (6 lines), Regular pentagon and 5 - pointed star (5 lines), Square (4 lines), Equilateral triangle (3 lines), Rectangle (2 lines), Isosceles triangle (1 line), Parallelogram and trapezoid (0 lines)
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| Place figures here | Name of figure | How many lines? |
|---|---|---|
| Regular hexagon | Regular hexagon | 6 |
| Regular pentagon, 5 - pointed star | Regular pentagon, 5 - pointed star | 5 |
| Square | Square | 4 |
| Equilateral triangle | Equilateral triangle | 3 |
| Rectangle | Rectangle | 2 |
| Isosceles triangle | Isosceles triangle | 1 |
| Parallelogram | Parallelogram | 0 |
| Trapezoid | Trapezoid | 0 |