Answer:
The answer is 5/6
Step-by-step explanation:
To get this answer u minus 2/3 from 1 1/2,u get 5/6.Then if u add 5/6 and 2/3 u get 1 1/2 so this tells u your answer is 5/6
5 times 3
you do 5 time 3. it is 15
the sum of the other two angle is 93
180-87=93
