Pythagoras (late)

this question is from page 110. Question 3

3. Walter walks across a rectangular fi eld in a
diagonal line. Maria walks around two sides
of the fi eld. They meet at the opposite corner.




a) How far did Maria walk?
300+120= 420m

b) How far did Walter walk?
a2+b2=c2
3002+1202=c2
300x300+120x120=c2
90000x144000=c2
c2=104400 or 323m

c) Who walked farther? By how much?
420m-323m=97
Maria walked farther by 97 m