We cannot take half of 9 people. The even numbers, then, are the numbers divisible by 2: 2, 4, 6, 8, and so on. The odd numbers are 1, 3, 5, 7, and so on. If you do not know half of some even number, you can find it by decomposing it mentally into two even numbers whose half you do know.
To draw a shape, line or angle accurately using a compass and straightedge (ruler). Sometimes you are also allowed to use a protractor and triangle.
Construction is a general term meaning the art and science to form objects, systems, or organizations, and comes from Latin constructionem (from com-together and struere to pile up) and Old French construction. Construction is used as a verb: the act of building, and a noun: how a building was built, the nature of its structure. Types of construction Industrial assemblage of a thermal oxidizer in the United States of America.