Édouard Manet used friends and family as models for the people represented in Le Déjeuner sur l'Herbe (fig. 1.10)

What is innovative about Rem Koolhaas's design for the Casa da Musica?

a) its location on a difficult site b) its sculptural form c) the use of nontraditional materials d) its transparent exterior

What is the simplest possible ratio between two frequencies, or 2:1, called?

a. an interval b. an octave c. a harmonic d. a chord