For the first question, the second choice is the answer.
Look at position of each letter in the answer choices. If S is the first letter of one of the triangles, G must be the first letter of the other triangle name.
You have to "match" the letters.
For the second question, we know the following:
A = D = 50
B = E = 30
C = F = ?
("Matching" the order of the letters)
The sum of all the angles of a triangle is 180.
180 - 50 - 30 = 100.
The third choice is your answer.
Have an awesome day! :)
