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In DeltaABC, BC=CA and angleA=40^(@). Fi...

In `DeltaABC, BC=CA` and `angleA=40^(@)`. Find the largest side of `DeltaABD`.

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In `DeltaABC`
`AC=BC`
`implies" "angleABC=angleBAC`
`implies" "angleABC=40^(@)`
Now, `angleA+angleB+angleC=180^(@)`
`implies" "40^(@)+40^(@)+angleC=180^(@)`
`implies" "angleC=180^(@)-80^(@)=100^(@)`
Now, `angleC` is the greatest angle in `DeltaABC`.
`:.` Its opposite side AB will be the largest side.
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