Triangles and cubes ...?
A) 20 1cm edge cubes have white faces: 44 1 cm edge have blue faces. the 64 cubes are glued together to form a cube with edge 4 cm. what is the minimum surface area that could be white? b) in the equilateral triangle abc with triangle pqr situated inside, ab = 5cm, ap = 4cm, bq = 4cm and cr = 3cm. if s is the aread of triangle abc, what is the area of triangle pqr in terms of s.
