I am trying to figure out how to go about solving the following figures. Find the area to two decimal places. Finding the area of a triangle is fairly simple, but when it comes to these figures I am stuck. I tried making them into triangles and using law of sin/cos but it doesnt seem to work.
I tried the following, but its wrong:
S = 1/2 (5 + 6 + 8 + 7) S = 13 A = sqrt( 13(13-5)(13-6)(13-8)(13-7) ) A = 147.78
here is a link to the figures http://i.stack.imgur.com/9HCcS.png