Makro
Porcupine
Part b)
The diagram shows two parallel brick walls KJ and MN joined by a fence from J to M. The wall JK is s metres long and <kjm the="" fence="" jm="" is="" l="" metres="" long.="">
A new fence is to be built from K to a point P somewhere on MN. The new fence KP will cross the original fence JM at O.
Let OJ = x metres, where 0 < x < L.
i) Show that the toal area, A square mentres, enclosed by triangle OJK and triange OMP is given by
A = s( x - L + (L2/2x))sin(alpha)
--------------------
Area of triangle is 1/2absinC from what I know. Why does it prove that the two triangles are similar in the book? I don't understand why they're proven to be similar. Where does it ask for or need that?
</kjm>
The diagram shows two parallel brick walls KJ and MN joined by a fence from J to M. The wall JK is s metres long and <kjm the="" fence="" jm="" is="" l="" metres="" long.="">
A new fence is to be built from K to a point P somewhere on MN. The new fence KP will cross the original fence JM at O.
Let OJ = x metres, where 0 < x < L.
i) Show that the toal area, A square mentres, enclosed by triangle OJK and triange OMP is given by
A = s( x - L + (L2/2x))sin(alpha)
--------------------
Area of triangle is 1/2absinC from what I know. Why does it prove that the two triangles are similar in the book? I don't understand why they're proven to be similar. Where does it ask for or need that?
</kjm>
