Can some assist me with these two problems please?
1) if segment FH= 21, and segment GH= 18, calculate the length of segment FG
a) 3 radical 42
b) 3 radical 85
c) 3 radical 13
d) 15
2) if segment FI= 6 and segment IH= 12, calculate the length of segment GI.
a) 12
b) 10
c) 6 radical 2
d) 8

Question

Can some assist me with these two problems please? 
1) if segment FH= 21, and segment GH= 18, calculate the length of segment FG
a) 3 radical 42
b) 3 radical 85
c) 3 radical 13
d) 15
2) if segment FI= 6 and segment IH= 12, calculate the length of segment GI.
a) 12
b) 10
c) 6 radical 2
d) 8

anonymous · Answer

https://byuis.brainhoney.com/Resource/10035010,5B3,0/Assets/Media/Images/GEOM043_CSR1-18.jpg

anonymous · Answer

A 
2. D

anonymous · Answer

can you explain how you got those answers please? I've geometric means and such and I always got funky answers ):