Theory of Structures
For determining the support reactions at A and B of a three hinged arch, points B and Care joined and produced to intersect the load line at D and a line parallel to the load line through A at D’. Distances AD, DD’ and AD’ when measured were 4 cm, 3 cm and 5 cm respectively. The angle between the reactions at A and B is

30°
60°
90°
45°

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Theory of Structures
Slenderness ratio of a long column, is

Length of column divided by least radius of gyration
Area of cross-section divided by least radius of gyration
Radius of gyration divided by area of cross-section
Area of cross-section divided by radius of gyration

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