Construct a triangle ABC, in which `angleB=60^@` , `angleC=45^@` and AB + BC + CA = 11 cm.
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Draw a line segment `XY` eqaul to `AB+AC+BC=11cm`
Make an angle equal to `/_B=60^@` from point `X`. Let the angle be `/_LXY`
Make an angle equal to `/_=45^@` from point `Y`, Let the angle be `/_MYX`.
Bisect angles `/_LXY` and `/_MYX`. Let the bisectors intersect at point `A`.
Make perpendicular bisector of `AX`. Let it intersect `XY` at point `B`.
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