Question 1:
Match the letters/points that correspond to each other.
All choices start with "EAK", so that's our reference.
For the second triangle, we get AGK.
For the last triangle, we get EGA.
Question 2:
For this, just take the mean of 5 and 12.
[tex] \frac{5+12}{2} [/tex]
[tex] \frac{17}{2} =8 \frac{1}{2} [/tex]
Hope this helps! :)