The perimeter of a triangle is 40 cm and the in radius of the triangle is 2.5 cm. What is the area of the triangle?
Choose the correct choice from the following options:
A) 76  B) 88  C) 66  D) 55  E) 50
Area of a triangle = r * s   Where r is the in radius and s is the semi perimeter of the triangle.   Area of triangle = 2.5 * 40/2= 
<gadget id="calculator">2.5 * 40/2</gadget>
<output>50</output>
50 cm2   Answer:50
<result>E</result>
The perimeter of a triangle is 40 cm and the in radius of the triangle is 2.5 cm. What is the area of the triangle?