Paper 1 May/June 2009 MATHEMATICH (9709/1) A Levels
لطفا برای اطمینان از عملکرد و تجربه بهتر از مرورگرهای مدرن و به روز مانند کروم یا فایرفاکس استفاده کنید.

The line ${L_1}$ passes through the points $A\left( {2,\,\,5} \right)$ and $B\left( {10,\,\,9} \right)$. The line ${L_2}$ is parallel to ${L_1}$ and passes through the origin. The point $C$ lies on ${L_2}$ such that $AC$ is perpendicular to ${L_2}$. Find
a) the coordinates of $C$,
b) the distance $AC$.