In the triangle below, the value of h is 3/4 the side length that is labeled on the figure. what is the area of the triangle?

The correct answer is:  [C]:  " 8.64 mm² " .

Note: 

Area of a triangle = (½)*(base length)*(height; that is, "perpendicular height");

or:  A = (½) * b * h ;

Given:  "b = 4.8 mm" ;
            "h = (¾) * b = (¾)* (4.8 mm) = 3.6 mm ;
               → h = 3.6 mm ;

  →  A = (½) * b * h  ;

           = (½) * (4.8 mm) * (3.6 mm) ;

    →  A  =  8.64 mm² ; which is:  Answer choice: [C] .

The answer is 6 weeks