akota wants to make a logo using the letter M. In the diagram, he claims that m∠DBC = m∠BDC. The letter M plotted in the first quadrant of a coordinate plane. The vertices are: A, (0, 0), B, (0, 5), C, (3, 0), D, (6, 5), and E, (6, 0). Find m∠BCD using the fact that m∠BCD = x + 3.