Still Confused?

Try reviewing these fundamentals first

Still Confused?

Try reviewing these fundamentals first

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Start now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started NowStart now and get better math marks!

Get Started Now- Intro Lesson: a4:02
- Intro Lesson: b3:05
- Intro Lesson: c5:55
- Intro Lesson: d7:35
- Lesson: 1a1:51
- Lesson: 1b4:12
- Lesson: 1c2:31
- Lesson: 1d1:26
- Lesson: 2a1:14
- Lesson: 2b2:54
- Lesson: 2c1:30
- Lesson: 2d1:48
- Lesson: 2e1:18
- Lesson: 2f2:19
- Lesson: 3a3:08
- Lesson: 3b1:58
- Lesson: 3c2:42
- Lesson: 4a3:02
- Lesson: 4b4:12
- Lesson: 4c10:09
- Lesson: 5a8:05
- Lesson: 5b4:05
- Lesson: 5c4:53

In this lesson, we will learn:

- How to identify symmetrical vs. asymmetrical shapes or pictures
- How to check symmetry lines with the folding method or mirror test method

- A "
**symmetrical**" shape is made up of exact same parts facing each other - A
**line of symmetry**divides a symmetrical shape into 2**congruent**parts - If the shape is not symmetrical it is "
**asymmetrical**"

- Check if a shape has a
**line of symmetry**by**folding it in half**to see if the parts match up

- or using a
**mirror test**: laying the picture/shape flat and putting a mirror on a possible symmetry line to see if the mirrored image matches with the original

- Some shapes
*have more than one*line of symmetry.**Regular polygons**have the same number of symmetry lines as number of sides - some words (alphabet letters) and numbers also have symmetry:

Ex. triangles = 3 sides = 3 symmetry lines

- IntroductionIntroduction to Basics of Symmetry:a)What is symmetry? What is a symmetrical shape?b)Folding test for lines of symmetryc)Mirror test for lines of symmetryd)Symmetry in alphabet letters and numbers
- 1.
**Congruent parts and lines of symmetry**

A dotted line breaks the shape into two parts.- Is it a line of symmetry?
- Are the parts congruent?

a)b)c)d) - 2.
**Line of symmetry**

Draw a line of symmetry for the shape.a)b)c)d)e)f) - 3.
**Multiple lines of symmetry**

Draw two possible lines of symmetry.a)b)c) - 4.
**Symmetrical shapes on a dot grid**

Using the dot grid, finish drawing the shape. The line of symmetry and half of the shape are shown.a)b)c) - 5.
**Symmetry of regular polygons**a)For each regular polygon, draw all possible lines of symmetry and fill out your answers in the table.b)Following the pattern for regular polygons, how many lines of symmetry would a heptagon have?c)Following the pattern for regular polygons, how many lines of symmetry would an octagon have?