318 The golden section
Exercise
1.Show thatcos 36◦=φ 2.2.Which of the two equilateral triangles inscribed in a regular pen-
tagon has larger area?3.Which of the two squares inscribed in a regular pentagon has larger
area?
ann
(Ann)
#1
318 The golden section
Exercise
1.Show thatcos 36◦=φ 2.2.Which of the two equilateral triangles inscribed in a regular pen-
tagon has larger area?3.Which of the two squares inscribed in a regular pentagon has larger
area?