Draw an angle ABC of measure 45^{o}, using ruler and compasses. Now draw an angle DBA of measure 30^{o}, using ruler and compasses as shown in Fig. 9.23. What is the measure of \angleDBC?
Draw an angle ABC of measure 45o, using ruler and compasses. Now draw an angle DBA of measure 30o, using ruler and compasses as shown in Fig. 9.23. What is the measure of DBC?