Basic trigononmetry questions

<p>Can someone help me solve these 6 math problems? I try to self study triangle but I got stuck on these questions. It's on this website. Including finding area, and ratios
Science</a> - The everyday arithmetic</p>

<p>Thank You</p>

<p>angle 1 = 55 degs
angle 2 = 55 degs
angle 3 = 35 degs
angle 4 = 35 degs
angle 5 = 55 degs</p>

<p>A/B/C/D = ?? I’m not sure which letters correspond to which parts of the triangle.</p>

<p>17) h = L(1-cos(theta))
18) Plug in the numbers with a calculator</p>