Question: 2. An engineering student was given an assignment to construct a triangular model of the three steel girde Two of the girders measured 20cm

2. An engineering student was given an assignment to construct a triangular

2. An engineering student was given an assignment to construct a triangular model of the three steel girde Two of the girders measured 20cm and 15cm, and the angle opposite the 15cm girder was 21. How lon does the third girder have to be?

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