[填空题]
A large triangular garden, Ayl,xzbg)h-m.r t:p w*BC, is shown in the diagram below. A walking c hag/5xcxb +x:2:utmpbt) r) path passes through the garden at point D and leaves at point E, such that DE is parallel to the garden bb b+2m:x )tapxh:x5t / cucrg)oundary BC.
Triangles ABC and ADE are found to be similar (same shape, but side lengths can vary). Angles $AD̂E = AB̂C =\theta$ and $AÊD = AĈB =\alpha$.
1.Find the value of
1.x. m
2.y. m
2.Find the value of
1.$\alpha$. $^{\circ}$
2.$\theta$ $^{\circ}$
3.$\gamma$ $^{\circ}$
3.Find the area of the triangle ABC, rounding your answer to the nearest $m^2$. $m^2$
