Sine and cosine rules
 

Sine and cosine rules problem 21


Diagonals e and f in a trapezium are 5.32 and 10 cm, and sides c and d are 5 and 1.26 cm and an internal angle measures 165.81 °.


Calculate the area of the figure bounded by the angle bisector , the base a, and the bisector of the base a.


 

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