Question

if the sum of 9 angles of a decagon is 1390. what is the size of the remaining angles ?​

Answer 1

Answer:

formula for finding sum of total angles is = 180(n-2)

Step-by-step explanation:

for decagon

180(10-2)

180*8

=1440

therfore

other angle is equal to

1440-1390

=50 degrees