The diagram shows the plan, front elevation and side elevation of a concrete block, drawn on a centimetre grid. The grid consists of 1 cm squares.

• The front elevation is a symmetric trapezium with a base of 6 cm, a top of 4 cm and a height of 2 cm.
• The plan is a 6 cm by 3 cm rectangle with two vertical lines, each 1 cm from the left and right edges.
• The side elevation is a rectangle with dimensions 3 cm by 2 cm.