sentences: a door is a kind of object & height is a measure of length from the top of an object to the bottom of an object ->  the height of a door is a measure of length from the top of the door to the bottom of the door  the height of a door is a measure of length from the top of the door to the bottom of the door & a meter stick is a kind of tool for measuring length -> a meter stick can be used to measure the height of the door