Answer:
Cant do this because we dont have your username and password and the link you gave us isnt signed into your account sorry
Answer:
I guess it is the Answer C
Measurement of one angle and length of one side I think
Simply it as follows:
1 + 39 = 40
2 + 38 = 40 etc
18 + 22 = 40
19 + 21 = 40
There are 19 of these plus 40 itself . . .therefore 20 of them
20 x 40 = 800
And finally the last number not used, 20
Therefore 800 + 20 = 820
