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**lakeheadca****Member**- Registered: 2010-01-31
- Posts: 37

in the diagram of triangle ABC and EDC below, AE and BD intersect at C, and angle

CAB approx= CED

which method can be used to show that triangle ABC must be similar to Triangle EDC.

1. SAS

2.SSS

3.AA

4.HL

please explain? thanks

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**ZHero****Real Member**- Registered: 2008-06-08
- Posts: 1,889

∠ACB=∠ECD

∠CAB=∠CED

Hence, the third angles must also be equal...

∠ABC=∠EDC

∴ AAA or (AA)

If two or more thoughts intersect, there has to be a point!

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