Hello again 8th grade mathematicians! Today we are going to do an activity to practices finding how many lines of symmetry a shape has. You are going to use this Google Draw activity to identify how many lines of symmetry each shape has. After you have done this there are a few questions I want you to answer in your notebook:
- How many lines of symmetry does each shape have?
- How many sides does the shape have?
- Is there a pattern between the amount of sides and the number of lines of symmetry?
- If I told you a shape had 20 sides (each side has the same length), would you be able to tell me how many lines of symmetry it has?
Check your answers below by sliding the bar to reveal the lines of symmetry for each shape!
Make a copy of this Google Draw by clicking the image of the title “Spectacular Symmetry” below!
Goal of this lesson:
To allow student to discover the relationship between lines of symmetry, types of shapes and number of sides. This Google Drawing gives the students the freedom to use lines to find all of the lines of symmetry as well as to find patterns using 6 different shapes. This lesson can be used for students at many different levels: from introducing shapes and lines of symmetry to trigonometry.
Other ways you could use a this Google Draw Activity
- An exit ticket to check for level of understanding
- Partner activity: each student completes all 6 shapes and then compares answers
- Introduction to symmetry: ask students to place lines where they could divide the shape (without explicitly saying lines of symmetry)
- Homework assignment