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(Solved): In concave quadrilateral ABCD, the angle at A measures 24.ABD is isosceles, BC bisects ABD ...
In concave quadrilateral ABCD, the angle at A measures 24?.?ABD is isosceles, BC bisects ?ABD, and DC bisects ?ADB. What are the measures (in degrees) of ?ABC,?ADC, and ?1 ? m?ABC=m?ADC=m?1=?