In an isosceles triangle, the two congruent sides have a length of 28 cm. The measure of the included angle is 41º. To the nearest square centimeter, what is the area of the triangle? Enter your answer with units, and in your own words, indicate how you arrived at the answer giving proper steps or justification.

Note: Please enter your answer on a piece of paper and compare it with the sample answer given or get it graded by your teacher.