I think it’s B if not I can’t tell because I can’t see all the questions .
That means one whole is cut into 8 parts, and one of those eight parts is considered to be one-eighth of a whole
{think about it like a pizza with 8 slices]
Answer:
x=8
base side of isosceles triangle
y=√{8²+8²}=8√2
Factor 3 out of 6a+3 .. 3(2a+1). if you simplify that it will take you back to 6a+3