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Equilateral Crease (Posted on 2013-04-13) Difficulty: 3 of 5
A paper has the precise shape of a triangle which is denoted by ABC, with AB = BC = CA = x (say) and, D is a point on BC.

Vertex A is joined onto D forming the crease EF - where E is on AB and F is on AC.

Given that DF is perpendicular to BC, determine:
  1. The length of EF in terms of x.
  2. The area of each of the triangles BED, DEF and DFC in terms of x.

No Solution Yet Submitted by K Sengupta    
Rating: 3.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: Solution Comment 4 of 4 |
(In reply to Solution by Salil)

The square root symbol and 1/2 symbol has come out ji and o respectively. But in word file symbol where correct. 
  Posted by Salil on 2013-04-22 02:33:05

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