Lines of Symmetry in Polygons

The video tutorial introduces the concept of symmetry, focusing on identifying and drawing lines of symmetry in two-dimensional figures. It explains the use of tracing paper to visualize symmetry and provides examples with quadrilaterals, hexagons, and other shapes. The tutorial emphasizes that the number of lines of symmetry corresponds to the number of equal sides in a shape, using various examples to illustrate this point.

What tools are used to demonstrate lines of symmetry in the video?

• Calculator, pencil, and eraser

• Paddy paper, marker, and marker board

• Ruler, compass, and protractor

• Scissors, glue, and paper

What does symmetry mean in the context of two-dimensional figures?

• Being able to rotate 360 degrees

• Having more than four sides

• Being identical on both sides of a line

• Having different shapes on each side

Which of the following is NOT a correct line of symmetry?

• A line that divides a shape into two identical halves

• A line that cuts through the center of a shape

• A line that is off-center and creates unequal halves

• A line that reflects the shape perfectly

How many lines of symmetry does a square have?

• Four

• Three

• Two

• Five

Why can't a rectangle have four lines of symmetry like a square?

• Because it is not a polygon

• Because it has more than four sides

• Because it is not a quadrilateral

• Because it has unequal sides

What determines the number of lines of symmetry in a polygon?

• The number of angles

• The number of vertices

• The number of diagonals

• The number of equal sides

How many lines of symmetry does a regular hexagon have?

• Three

• Six

• Four

• Five

Which shape is likely to have zero lines of symmetry?

• An irregular trapezoid

• An equilateral triangle

• A square

• A regular pentagon