CASE STUDIES · VISUALISE
Case studies (2)
MaterialU.S. case: Lucy v. Zehmer (1954)
Does “it was a joke” prevent a contract from forming?
A 1954 American case about the sale of a farm. Why did the court reject the seller’s defences that it was a joke and that he was drunk? Follow the judgments from the buyer’s claim to the ruling in a single diagram.
MaterialEntrance-exam arithmetic (solids)
The volume of a triangular pyramid from its net
Fold a 12 cm square into a triangular pyramid and find its volume. Solved in three steps, starting from spotting which edges become perpendicular when folded.