Lines of Symmetry in Shapes

The video tutorial introduces the concept of line of symmetry, explaining it as an imaginary line that divides an object into two mirror-image halves. The lesson covers symmetry in various shapes, including triangles, quadrilaterals, and pentagons, highlighting how many lines of symmetry each shape has. The tutorial includes interactive exercises to reinforce learning and concludes with a summary of key points.

What should students prepare before starting the lesson?

• A calculator and ruler

• A mat notebook and pencil

• A laptop and headphones

• A textbook and eraser

What is a line of symmetry?

• An imaginary line where one side is a mirror image of the other

• A line that only exists in three-dimensional shapes

• A line that can be drawn anywhere on a shape

• A line that divides a shape into two unequal parts

How many lines of symmetry does a regular triangle have?

• Two

• One

• Four

• Three

Which quadrilateral has four lines of symmetry?

• Rhombus

• Square

• Rectangle

• Trapezoid

How many lines of symmetry does a regular pentagon have?

• Two

• Three

• One

• Five

What is the line of symmetry in an irregular pentagon?

• One line going up and down

• One line going across

• Two lines crossing each other

• No lines of symmetry

How many lines of symmetry does a shape with four lines of symmetry have?

• One

• Zero

• Four

• Two

In the exercises, what is the correct number of lines of symmetry for a shape with three lines?

• Three

• Two

• One

• Zero

What is the correct number of lines of symmetry for a shape with two lines?

• Three

• Two

• One

• Zero

How many lines of symmetry does a shape with one line of symmetry have?

• Three

• Zero

• One

• Two