Exercise 1

Exercise 2

Exercise 3

Exercise 4

Exercise 5

Exercise 6 - updated version includes calculation of minimum & maximum points

Exercise 7 - updated to correct typo: equilateral replaced by isosceles

Exercise 8

Exercise 9 - updated to make the proof easier to follow 19/01/2015

Exercise 10 - updated to change equilateral to isosceles & clarify 18/01/2015

Exercise 11

Exercise 12 - updated 25/7/2014 to correct typo in figure 2 (see blog for details)

Exercise 13 - updated 12/10/2014 (see blog for details)

Exercise 14

Exercise 15

Exercise 16

Exercise 17

Exercise 18

Exercise 19

Exercise 20

Exercise 21

Exercise 22

Exercise 23

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