Need help on geometry!!!

15. Which of the following is a straight angle ?
a)
b)
c)
d)

16. If m (angle) HOI = 21 and m (angle) GOI = 47, then what is the measure of (angle) GOH ?

Need help on geometry 15 Which of the following is a straight angle a b c d 16 If m angle HOI 21 and m angle GOI 47 then what is the measure of angle GOH class=