question_answer

If the degree measures of the angles of a quadrilateral are \[4x,\,\,7x,\,\,9x\] and\[10x\], what is the sum of the measures of the smallest angle and the largest angle?

A) \[{{140}^{o}}\]          

B)                                \[{{150}^{o}}\]       

C)                \[{{168}^{o}}\]                                  

D)        \[{{180}^{o}}\]