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#1 2010-06-24 16:59:24
- lakeheadca
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- Registered: 2010-01-31
- Posts: 37
Geometry: grade 11 problem#1
Give triangle ABC and EDC, c is the midpoint of
__ __
BD and AE.
prove: AB|| DE
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#2 2010-06-24 17:11:08
- ZHero
- Real Member
- Registered: 2008-06-08
- Posts: 1,889
Re: Geometry: grade 11 problem#1
∠ ACB = ∠ DCE (vertically oppsite ∠s)
AC/DC = BC/EC = 1/2 (given)
∴ ACB∼DCE (SAS similarity)
∴ ∠ABC = ∠DCE
AB||DE (alternate angles are equal)
If two or more thoughts intersect, there has to be a point!
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