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### 25 Cards in this Set

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 triangle a polygon having three sides geometry a branch of mathematics dealing with the relations, properties, and measurements of solids, surfaces, lines, points, and angles mathematics the science of numbers and their properties, operations, and relations and with shapes in space and their structure and measurement astromony the science of objects and matter beyond the earth's atmosphere geography a science that deals with the natural features of the earth and the climate, products, and inhabitants librarian a specialist in the management of a place in which books and related materials are kept for use but not for sale calculate to determine by mathematical processes pulley a wheel used to transmit power by means of a belt, rope, or chain lever a rigid piece turning about an axis and used for transmitting and changing force and motion screw a machine consisting of a solid cylinder with a spiral groove around it and a corresponding hollow cylinder into which it fits logic a science that deals with the rules and tests of sound thinking and proof by reasoning systematic characterized by use of method or orderly planning, methodical reasoning the drawing of inferences or conculsions from known or assumed facts constellation any of 88 groups of stars forming patterns circumference the perimeter of a circle radius a straight line extending from the center of a circle or a sphere pi the symbol denoting the ratio of the circumference of a circle to its diameter; also : the ratio itself equal to approximately 3.1416 theatre a building for dramatic performances skene Greek word from which we get the word scene, was originally a stage building chorus an organized company of singers tragedy a serious drama with a sorrowful or disastrous conclusion comedy a light amusing play with a happy ending deas ex machine an unexpected, artificial, or improbable character, device, or event introduced suddenly in a work of fiction or drama to resolve a situation or untangle a plot thespian actor Satyr play a type of ancient Greek burlesque or comic play with a chorus represented as satrys