question_answer

An angle measures \[\left( 40-x \right){}^\circ .\] What is the measure of its complementary angle?

A)  \[\left( x-40 \right){}^\circ \]       

B)         \[\left( 50+x \right){}^\circ \]

C)  \[\left( 50-x \right){}^\circ \]        

D)         \[\left( 40-x \right){}^\circ \]