This resource has been contributed by Winpossible, and can also be accessed on their website by clicking here - Symmetry
In this mini- lesson, you'll learn the concepts and application of symmetry, explained with the help of video and in own writing by the instructor. In the content here, you will find some examples and practice questions with solution. A figure has line symmetry, if it can be reflected about a line onto itself and each regular polygon has as many lines of symmetry as it has sides. E.g. an equilateral triangle has three lines of symmetry. Now look at the example: line of symmetry for the rectangle A
(-6, 4), B
(6, 4), C
(6, -4), and D
(-6, -4) is x
= 0 and y
= 0. A figure has point symmetry, also called 180° rotational symmetry, if it can be rotated 180° about a point onto itself. E.g. the isosceles triangle has line or reflection symmetry and the letters H, I, N, O, S, X and Z have point symmetry.
This FREE mini-lesson is a part of Winpossible's online course that covers all topics within Geometry. Click on the video below to go through it. If you like it, you can buy our online course in Geometry by clicking here.