The coke machine in college takes 50 pence pieces. It also takes a certain foreign coin of traditional design...
A and C are the opposite vertices of a square ABCD, and have
coordinates (a,b) and (c,d), respectively. What are the coordinates
of the vertices B and D? What is the area of the square?
A white cross is placed symmetrically in a red disc with the central square of side length sqrt 2 and the arms of the cross of length 1 unit. What is the area of the disc still showing?
The green triangle has side lengths of 65, 52, and 39 cm and the
blue triangle has side lengths of 52, 48, and 20 cm.
An object is dropped from the top of the green triangle, where
does it pass the base of the blue triangle?
In what proportion is the blue base split and how far has the
This problem does not require a calculator or any special