Steps of construction:
1. Draw a line segment XY of 6.4cm.
2. Draw ∠DXY = B = 60o and ∠EYX =∠C = 45o
3. Draw the angle bisector of ∠DXY and ∠EYX which interest each other at A.
4. Draw the perpendicular bisector of AX and AY which interest XY at B and C respectively.
5. Join AB and AC
Therefore ΔABC is the required triangle.