A triangle has a perimeter measuring 28 cm and an inradius of 2.5 cm. What is the area of this triangle?

Explanation

The area of a triangle can be calculated using the formula: Area = inradius × semi-perimeter. Given the inradius (r) is 2.5 cm and the perimeter is 28 cm, the semi-perimeter (s) is 28/2 = 14 cm. Therefore, the area = 2.5 × 14 = 35 cm², which is not listed among the options, so the correct answer is 'None of the above'.