Surface area : octagon.
| Other author | Teachers TV (Television Channel), producer. |
| Format | Video (Streaming) |
| Publication Info | [London] : Teachers TV/UK Department of Education, 2009. |
| Description | 1 online resource (2 min.). |
| Supplemental Content | https://go.openathens.net/redirector/ecu.edu?url=http://www.aspresolver.com/aspresolver.asp?EDIV;1737947 |
| Subjects |
| Series | Shopping mall ; 1 |
| Abstract | This is a maths problem on surface area, ideal for use as a lesson starter with KS3 classes. The clip is shot in a shopping centre to provide an engaging, real-life context for the maths. The problem: The shopping-centre floor has an eye-catching design: an equilateral octagon, each side measuring 6 metres. Students must calculate the surface area of the octagon. Maths expert Isaac Anoom gives three examples of how the problem could be tackled: The first example is to separate the octagon into smaller shapes - 1 square, 4 right-angled isosceles triangles and 4 rectangles.The second example is to think of it as a big square with 4 right-angled triangles cut off.Thirdly, one could divide the octagon into eight isosceles triangles, then divide 360 by 8 and work out the area of the triangle using Pythagoras.This method works for any regular polygon. |
| General note | Title from resource description page (viewed Mar. 5, 2012). |
| Other forms | Previously released as DVD. |
| Reproduction note | Electronic reproduction. Alexandria, VA : Alexander Street Press, 2012. (VAST: Academic Video Online). Available via World Wide Web. |
| Language | This edition in English. |
| Genre/form | Instructional television programs. |
Availability
| Library | Location | Call Number | Status | Item Actions |
|---|---|---|---|---|
| Electronic Resources | Access Content Online | ✔ Available |