Question

http://prntscr.com/a5fjlq

Answer 1

do you think it's 1075 and why?

Answer 2

edaued guess

Answer 3

is it right

Answer 4

yes, it's right, but you need to know the way to get that solution
here is one way: http://prntscr.com/a5fxbq

Answer 5

A stands for area, and a is for side

Answer 6

what

Answer 7

so this is a pentagon - yes ?

and this is formed by 5 congruent triangles

so you know the apothem of this pentagon but this apotem is eaxctly the height of a triangle for what you need calculi area and you know the base what is the side of this penthagon - so you calculi area of a triangle and multiplie by 5 and so will get area of this peanthagon sure right easy

Answer 8

do you understand me ?

Answer 9

just calculi area of a triangle and multiplie by 5 and so will get area of penthagon

ok. ?