Question

hello please help solve 10 , 11 ,12 ,13 .


pleaseeee ....

Answer 1

10) angle AOD -80 BECAUSE IT IS ON A STRAIGT LINE BD AND THEREFORE, AOB+AOD-180
angle BDA -35 BECAUSE IT IS ALTERNATE TO DBC
ANGLE DAC-65 BECAUSE, IN TRIANGLE AOD both the angle we have found and DAC IS THE THIRD ONE AND BY ADDING BOTH THE ANGLES 80+35-115 AND SUBTRACTING IT BY 180 WE GOT 65