Answer:
The answer is 15
Step-by-step explanation:
You just have to multiply angle BC times angle AC to have the answer because angle AB is verticle to angle BD.
9 and 1/2 is the answer. We can find this by simply subtract 1 1/2 from 12.
20
1449÷72.45=20
4800 good luck
measure of the numbered angle : 24
