In this video, Mr. J introduces the concept of symmetry, explaining that a shape is symmetrical if it can be folded along a line so that both halves match exactly. The video covers four examples: a triangle, a rectangle, an oval, and an asymmetrical shape. Each example demonstrates how to identify lines of symmetry, with some shapes having multiple lines. The video concludes by noting that not all shapes are symmetrical and hints at more complex shapes to be covered in part two.

What does it mean for a shape to be symmetrical?

• It can be folded in half and both sides match perfectly.

• It has no lines of symmetry.

• It has more than two lines of symmetry.

• It can be folded in half but the sides do not match.

Tags

CCSS.4.G.A.3

Which of the following is true about a triangle's symmetry?

• A triangle can have no lines of symmetry.

• A triangle can have three lines of symmetry.

• A triangle can have one line of symmetry.

• A triangle can have two lines of symmetry.

Tags

CCSS.4.G.A.3

How many lines of symmetry does a rectangle have?

• Three

• Four

• Two

• One

Tags

CCSS.4.G.A.3

Which direction can you fold a rectangle to find a line of symmetry?

• Diagonally

• Vertically

• In a circle

• In a zigzag

Tags

CCSS.4.G.A.3

An oval has how many lines of symmetry?

• None

• Three

• Two

• One

Tags

CCSS.4.G.A.3

Which of the following is true about the symmetry of an oval?

• It has no lines of symmetry.

• It has one line of symmetry.

• It has two lines of symmetry.

• It has three lines of symmetry.

Tags

CCSS.4.G.A.3

What is the term for a shape that does not have any lines of symmetry?

• Symmetrical

• Multilateral

• Asymmetrical

• Bilateral

Tags

CCSS.4.G.A.3

If a shape cannot be folded to match both halves, it is considered:

• Foldable

• Perfectly matched

• Asymmetrical

• Symmetrical

Tags

CCSS.4.G.A.3

Which of the following shapes is likely to be asymmetrical?

• Circle

• Rectangle

• Irregular polygon

• Square

Tags

CCSS.4.G.A.3

What can you conclude if a shape has no lines of symmetry?

• It has multiple lines of symmetry.

• It is asymmetrical.

• It is symmetrical.

• It is perfectly symmetrical.

Tags

CCSS.4.G.A.3