instruction:
In this task, you need to answer the given multiple-choice question on geometry. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
question:
Problem: sides of a triangle are 13 cm . 14 cm . and 15 cm . respectively . calculate the area of triangle . 
Options: ['a ) 80', 'b ) 82', 'c ) 84', 'd ) 86', 'e ) 88']
answer:
c


question:
Problem: the area of a rectangular field is equal to 200 square meters . its perimeter is equal to 60 meters . find the width of this rectangle . 
Options: a ) 5 , b ) 10 , c ) 15 , d ) 20 , e ) 25
answer:
b


question:
Problem: the percentage increase in the area of a rectangle , if each of its sides is increased by 20 % is 
Options: a ) 38 % , b ) 40 % , c ) 44 % , d ) 48 % , e ) 50 %
answer:

c