GCSE Maths - Lines of Symmetry #98

The video tutorial explains the concept of symmetry in mathematics, focusing on how objects can be symmetrical with a line of symmetry dividing them into mirror images. It uses basic shapes like isosceles triangles, rectangles, and equilateral triangles to illustrate the concept. The isosceles triangle has one line of symmetry, the rectangle has two, and the equilateral triangle has three. The tutorial provides a method to identify lines of symmetry by drawing a line and checking if the two sides are symmetrical.

What is the term used to describe objects that have sides which are mirror images of each other?

• Perpendicular

• Parallel

• Symmetrical

• Asymmetrical

How many lines of symmetry does an isosceles triangle have?

• Three

• None

• Two

• One

Which shape has both vertical and horizontal lines of symmetry?

• Circle

• Square

• Rectangle

• Triangle

How many lines of symmetry does an equilateral triangle possess?

• Four

• One

• Two

• Three

Which of the following is a line of symmetry in an equilateral triangle?

• From one corner to another corner

• From top corner to bottom corner

• From one side to the opposite side

• From a corner to the midpoint of the opposite side