construct a triangle with base = 4.5cm, angle = 45 degree AB - AC = 2.5cm

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let the triangle be ABC.
steps:
1. draw BC=4.5cm
2. construct angle B = 45 degrees
3. draw BD = 3.5 cm and extended it such that angle DBC = 45 degrees
4. join C to D
5. draw perpendicular bisector of CD
6. extend the perpendicular bisector such that it intersects BD at A.
7. join A to C.
ABC is the required triangle
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