The perimeter of a triangle is 28 cm and the inradius of the triangle is 2.5 cm. What is the area of the triangle?  Choose the correct option
A) 25 cm2  B) 42 cm2  C) 49 cm2  D) 70 cm2  E) None of these
Area of a triangle = r * s   Where r is the inradius and s is the semi perimeter of the triangle.   Area of triangle = 2.5 * 28/2= 
<gadget id="calculator">2.5 * 28/2</gadget>
<output>35</output>
35 cm2   ANSWNone of theseR:None of these
<result>E</result>
The perimeter of a triangle is 28 cm and the inradius of the triangle is 2.5 cm. What is the area of the triangle?