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: what is the radius of the incircle of the triangle whose sides measure 5 , 12 and 13 units ?
Options: ['a ) 2 units', 'b ) 12 units', 'c ) 6.5 units', 'd ) 6 units', 'e ) 7.5 units']
answer:
a

question:
Problem: if the sum of a number and its square is 240 , what is the number ?
Options: a ) 15 , b ) 77 , c ) 25 , d ) 87 , e ) 171
answer:
a

question:
Problem: the size of a television screen is given as the length of the screen ' s diagonal . if the screens were flat , then the area of a square 20 - inch screen would be how many square inches greater than the area of a square 18 - inch screen ?
Options: a ) 2 , b ) 4 , c ) 16 , d ) 38 , e ) 40
answer:
d